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: Dental
[{'content': "A 10 years old female patient diagnosed as a case of\ndown's syndrome having mosaicism variety.\n\nOften IQ of such patients lie in the range of: \nSelect and explain. \nA. IQ 140-170, B. IQ 120-139, C. IQ 110-119, D. IQ 25-50", 'role': 'user'}, {'content': 'Answer: D \nExplanation: General manifestations of Down’s Syndrome\xa0Skull\na. Brachycephalic (round) skull resulting in a flattened face and occiput.\nb. Presence at birth of third fontanelle. Just anterior to the posterior fontanelle.\nc. Flat nasal bridges with a small maxilla.\nEyes\na. Oblique palpebral fissures with prominent epicanthic folds.\nb. Brushfield’s spots appear on the iris in a ring\xa0concentric with the pupil.\nc. Scanty eyelashes.\xa0\nd. Cataracts, squint and nystagmus are common.\nEars\nDysplastic ears with abnormal pinna.\nNeck\nShort and broad with excess skin posteriorly\nHands\na. Broad and short (clinodactyly) with a single transverse palmar crease (simian crease).\nb. Short incurved little finger.\nc. Multiple loops on finger tips.\nMuscles And Joints\nHypotonicity and hyperextensibility.\nIQ\nOften severely\xa0retarded with an IQ of 25-50.\nPaediatric Dentistry / Shobha Tandon - 2nd Ed\xa0 P: 539,540', 'role': 'assistant'}]