This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
[{'content': 'Horizontal line can be drawn by a child at the earliest by the age of: \nSelect and explain. \nA. 1 yr, B. 2 yrs, C. 3 yrs, D. 4 yrs', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b (2 years)Screening Scheme For Developmental Delay (Upper Range)Age (mths)Gross motorFine motorSocial skillsLanguage3Supports weight on forearmOpens hands spontaneouslySmiles appropriatelyCoos, laughs6Sits momentarilyTransferShows likes & dislikesBabbles9Pulls to standPincer graspPlays Pat-a-cake, Peek a-booImitates sound-12Walks with one hand heldReleases an object on commandComes when called1-2 meaningful words18Walks upstairs with assistanceFeeds from spoonMimics others actionAtleast 6 words24RunsBuilds a tower of 6 blocks.Draws a straight linePlays with others2-3 word sentences36Stands momentarily on footPlays with othersKnows full name.Understands speechOnly babbles48Hop, walk on straight lineCopy circleDiff. short from long lineProposition', 'role': 'assistant'}]