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
An 8 week infant can do all the following except ? 
Select and explain. 
A. Head control, B. Lift its head up to horizontal line in ventral suspension, C. Follows red object upto 180, D. Social smile
A: Head control
Answer: A: Head control 
Explanation: Ans. is 'a' i.e., Head control o Head control develops by 3 months. o In ventral suspension a child can lift his head in the horizontal plane by 2 months (8 weeks) o A child follows object with steady movement by 2 months (8 weeks). o Social smile develops by 2 months ( 8 weeks). o A child turns head to sound by 1 month.