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
A healthy baby will start turning head to sound by ....... of age: 
Select and explain. 
A. 3 - 4 months, B. 7 - 8 months, C. 9 months, D. 12 months
A: 3 - 4 months
Answer: A: 3 - 4 months 
Explanation: Ans. A. 3 - 4 monthsNewborns respond to sounds by startle, blink, cry, quieting, or change in ongoing activity. By 3 -4 months, the child turns head to sound. Hearing may be checked by producing sound 1 1/2 feet away from the ear (out of field of vision), and a pattern of evolving maturity of hearing can be observed, At -6 months of age the child turns head to one side and then downwards if a sound is made below the level of ears. By the age of 10 months the child directly looks at the source of sound diagonally.