Eustachian tube develops from:: (A) 2nd and 3rd pharyngeal pouch, (B) 1st pharyngeal pouch, (C) 2nd pharyngeal pouch, (D) 3rd pharyngeal pouch
Answer is B. Pharyngeal Pouch Derivatives 1 Tympanic (middle car) cavity, auditory (eustachian) tube 2 Palatine tonsils, tonsillar fossa 3 Inferior parathyroid gland, thymus 4 Superior parathyroid gland, ultimobranchial body (parafollicular C cells of thyroid)