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': 'A healthy baby will start turning head to sound by ....... of age: \nSelect and explain. \nA. 3 - 4 months, B. 7 - 8 months, C. 9 months, D. 12 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.', 'role': 'assistant'}]