The following structure open into the middle meatus.. Maxillary sinus

The following structure open into the middle meatus?

A- Nasolacrimal duct

B- Posterior ethmoidal sinus

C- Maxillary sinus

D- Sphenoid sinus

E- Anterior ethmoidal sinus (and middle).

a) A + B + D
b) A + B
c) u
d) All.