This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'Developmental milestone attained at 9 months of age is \nSelect and explain. \nA. Knows full name and gender, B. Monosyllables, C. Builds tower of 2 blocks, D. Stands with support', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Developmental milestones:-\nGROSS MOTOR DEVELOPMENT:\n2 months: Holds head in the plane of rest of the body when held in ventral suspension. In the prone position in bed, the chin lifts momentarily.\n3 months: lift head above the plane of the body. Head control starts by 3 months and fully developed by 5 months.\n4 months: Remain on forearm support if put in prone position, lifting the upper part of the body off the bed.\n5 months: Rolls over.\n6 months: sit in a tripod fashion.\n8 months: sits without support., crawling\n9 months: Takes a few steps with one hand held. Pulls to standing and cruises holding on to furniture by 10 months.\xa0\n10 months: creeps\n12 months: creeps well, walk but falls, stand without support.\n15 months: walks well, walks backward/ sideways pulling a toy. May crawl upstairs.\n18 months: Runs, walks upstairs with one hand held. Explores drawers.\n2 years: walk up and downstairs, jumps.\n3 years: rides tricycle, alternate feet going upstairs.\n4 years: hops on one foot, alternate feet going downstairs.\n5 years: skips\nFINE MOTOR DEVELOPMENT:-\n2 months- eyes follow objects to 180 deg.\n3 months-Grasp reflex disappears and hand is open most of the time.\n4 months- Bidextrous approach( reaching out for objects with both hands).\n6 months- Unidextrous approach( Reach for an object with one hand).\n8 months- radial grasp start to develop. Turns to sound above the level of ear.\n9 months- immature pincer grasp, probes with the forefinger.\n12 months- Unassisted pincer grasp. Releases object on request.Uses objects predominantly for playing, not for mouthing. Holds block on each hand and bang them together.\n15 months- imitate scribbling, tower of two blocks.\n18 months- scribbles, tower of 3 blocks. turn pages of a book, 2-3 at a time.\n2 years- tower of 6 blocks, vertical and circular stroke.\n3 years- tower of 9 blocks, dressing and undressing with some help, can do buttoning.\n4 years- copies cross, bridge with blocks.\n5 years- copies triangle, gate with blocks.\nSOCIAL AND ADAPTIVE MILESTONES:\n2 months: social smile(smile after being talked to).watches mother when spoken to and may smile.\n3 months: recognizes mother, anticipates feeds.\n4 months: holds rattle when placed in hand and regards it. Laughs aloud. Excited at the sight of food.\n6 months: recognizes strangers, stranger anxiety. Enjoy watching own image in the mirror, shows displeasure when toy pulled off.\n9 months: waves bye bye.\n12 months: comes when called, plays a simple ball game. kisses the parent on request. Makes postural adjustments for dressing.\n15 months: jargon, starts imitating mother.\xa0\n18 months: copies parents in tasking, dry by day, calls mother when he wants potty, points to three parts of the body on request.\n2 years: ask for food, drink, toilet, pulls people to show toys.\n3 years: shares toys, know full name and gender, dry by night.\n4 years: Plays cooperatively in a group, goes to the toilet alone, washes face, brushes teeth. Role play.\n5 years helps in the household task, dresses and undresses.\nLANGUAGE MILESTONES:\n1 month: alerts to sound.\n2 month: respond to sound by startle or quietening to a smooth voice.\n3 months: babbles when spoken to. Makes sounds (ahh, coos, ) laughs.\n4 months: laughs aloud.\n6 months: monosyllables\n9 months: understands spoken words, bisyllables.\n12 months: 1-2 words with meaning.\n18 months: a vocabulary of 10 words. Can name one part of the body.\n2 years: 3-word simple sentences.\n3 years: asks questions, knows full name and gender.\n4 years: says songs or poem, tells a story, knows three colors.\n5 years: ask the meaning of words.', 'role': 'assistant'}]