Stenson duct pierces the following structures :
a. Pharyngobasilar fascia
b. Superior constrictor muscle
c. Buccinator
d. Buccopharyngeal fascia
e. Masseter: (A) a, b, e, (B) b, a, e, (C) c, e ,a, (D) d, c
Answer is D. Parotid duct .