**Core Concept**
The withdrawal reflex is a fundamental physiological response that helps protect the body from harm by rapidly withdrawing a limb from a painful or threatening stimulus. It involves a complex interplay of sensory input, spinal cord processing, and motor output.

**Why the Correct Answer is Right**
The withdrawal reflex primarily consists of two main components: the flexor reflex and the reciprocal reflex. The flexor reflex is responsible for the contraction of flexor muscles, which pulls the limb away from the stimulus. The reciprocal reflex, on the other hand, involves the simultaneous inhibition of the extensor muscles, allowing for a more efficient withdrawal movement. The inverse stretch reflex, however, is not a component of the withdrawal reflex. Instead, it is a type of reflex that occurs when a muscle is stretched, leading to an involuntary contraction of that muscle.

**Why Each Wrong Option is Incorrect**
**Option A:** The flexor reflex is indeed a component of the withdrawal reflex, as it is responsible for the contraction of flexor muscles that pulls the limb away from the stimulus.
**Option B:** The reciprocal reflex is also a component of the withdrawal reflex, as it involves the simultaneous inhibition of the extensor muscles, allowing for a more efficient withdrawal movement.
**Option D:** The crossed extensor reflex is a component of the withdrawal reflex, as it involves the contraction of extensor muscles on the opposite side of the body, which helps to stabilize the limb during withdrawal.

**Clinical Pearl / High-Yield Fact**
Remember that the withdrawal reflex is a complex physiological response that involves multiple components, including the flexor reflex, reciprocal reflex, and crossed extensor reflex. Understanding these components is crucial for grasping the underlying physiology of pain perception and motor control.

**✓ Correct Answer: C. Inverse stretch reflex**