A) Diphyodont tooth
B) Ten pairs of cranial nerves
C) Seven cervical vertebrae
D) Left aortic arch in the circulatory system
Correct Answer: B
Solution :
In higher vertebrates (reptiles, birds, mammals) there are 12 pairs of cranial nerves. These are Olfactory (1) Optic (2) Oculomotor (3) Trochlear(4) Trigeminal (5) Abducent (6) Facial (7) Vestibulocochlear (8) Glossopharyngeal (9) Vagus (10) Accessory (11) and Hypoglossal (12)
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