<prompt> Number of hillocks from which auricle is developed-2468  <response>: Ans. is c i.e., 6 o Pinna Auricle develops from both 1st and 2nd pharyngeal arch Branchial arch: -Tragus and anterior crus of helix - 1st arch.Rest of the pinna - 2nd arch.o It developls from six tubercles hillocks which appear around the first branchial cleft,o Faulty- fusion between the first and the 2nd arch tubercles causes preauricular sinus or cyst. 