system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
True regarding the development of ear:
assistant
The correct answer is  A i.e. Eustachian tube opens at the level of inferior turbinate; B i.e. Pinna develops from the cleft of arch; C i.e. Growth of inner ear completed by 4th monthEustachian tube connects tympanic cavity with nasopharynx. It is about 36cm long in adults and runs downwards, forwards & medially at an angle of 45deg with horizontal from bony tympanic end to slit like pharyngeal end. Tympanic end is in the anterior wall of middle ear, just above the level of floor. While nasopharyngeal end is situated in the lateral wall about 1 -1.25 cm behind the posterior end of inferiro turbinateQ