Which among cranial nerves are mixed nerves that supply parasympathetic to viscera of thorax and abdomen?

Correct Answer: A

Rationale: The vagus nerve (CN X) is a mixed nerve with parasympathetic innervation to thoracic and abdominal viscera. Trigeminal (CN V) is sensory/motor for the face, accessory (CN XI) is motor, and abducens (CN VI) controls eye movement.

Correct Answer: C

Rationale: Sympathetic system originates thoracolumbar (T1-L2), mobilizes energy, and dilates bronchi, but bile secretion is primarily parasympathetic (digestion-related).

Correct Answer: B

Rationale: Beta receptors (β₁) in the heart increase rate and force when stimulated by norepinephrine/epinephrine. Alpha receptors are vascular, nicotinic are ganglionic, GABA is CNS.

Correct Answer: C

Rationale: The trochlear nerve (IV) innervates the superior oblique muscle for eye movement. Optic is sensory, trigeminal is facial, hypoglossal is tongue.

Correct Answer: B

Rationale: The lateral rectus, innervated by the abducens nerve (VI), moves the eye laterally. Oculomotor (III) and trochlear (IV) move other muscles.