The correct option is
D 10th cranial nerve
There are net 12 pairs of cranial nerves. The first cranial nerve is olfactory nerve, the second cranial nerve optic, the third cranial nerve is oculomotor nerve, the fourth is trochlear nerve, the fifth is trigeminal nerve, the sixth is abducens nerve, the seventh is facial nerve, the eighth is vestibulocochlear nerve, the ninth is glossopharyngeal nerve, the tenth is vagus nerve, the eleventh is spinal accessory nerve and twelfth is gypoglossal nerve.
So, option D is the correct option.