Which function is served by the hypoglossal nerve?

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Controls only the styloglossus and hyoglossus musclesProvides motor control to all intrinsic and extrinsic tongue musclesSupplies sensory input to the posterior third of the tongueConveys sensory information from the front two-thirds of the tongueNone of the above

Explanation

The hypoglossal nerve is responsible for motor innervation to all muscles of the tongue, including both intrinsic and extrinsic muscles. It does not provide sensory innervation; sensory functions of the tongue are served by other cranial nerves.