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B
9 pairs plus 1
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C
10 pairs plus 1
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D
10 pairs
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Solution
The correct option is D 10 pairs Frogs have ten pairs of cranial nerves. These nerves pass information from the outside directly to the brain. The names of cranial nerves are olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, auditory, glossopharyngeal, vagus. Accessory and hypoglossal nerve which is present in mammals are absent in frogs.