Concept: This question tests your understanding of the anatomy of the spinal cord and the function of its various components, specifically focusing on the pathways for motor impulses.

Why (C) is correct: Structure C represents the ventral root of the spinal nerve. The ventral root is composed of axons of motor neurons (efferent neurons) that carry impulses away from the central nervous system (spinal cord) to effector organs like muscles and glands. Therefore, it is responsible for carrying motor impulses out of the spinal cord.

Why other options are wrong:

• (A) Structure A – Dorsal root: The dorsal root (afferent root) carries sensory impulses into the spinal cord.
• (B) Structure B – Dorsal root ganglion: The dorsal root ganglion contains the cell bodies of sensory neurons, not motor neurons, and is involved in sensory input.
• (D) Structure D – Central canal: The central canal is filled with cerebrospinal fluid and is involved in the transport and circulation of CSF, not direct motor impulse transmission.

Common Mistake: Students often confuse the functions of the dorsal (sensory) and ventral (motor) roots of the spinal nerve.

NEET Tip / Mnemonic: Remember SAME DAVE: Sensory Afferent Motor Efferent; Dorsal Afferent Ventral Efferent. This helps distinguish the roles of dorsal and ventral roots.

Correct Answer: (C)