**Question:** Dripping Candle Wax lesion on spine is seen in-

A. Multiple Sclerosis
B. Lumbar Plexus Neuritis
C. Guillain-Barré Syndrome
D. B12 Deficiency

**Core Concept:** Dripping Candle Wax (also known as "Shadow of a Candle") is a clinical sign observed in neurological conditions involving the peripheral nerves or their distribution.

**Why the Correct Answer is Right:**

The correct answer is B. Lumbar Plexus Neuritis because it refers to inflammation of the lumbar plexus, which is a group of nerves originating from the lumbar spinal cord (L1-L3) and supplying the lower limbs. Inflammation in this region can lead to a characteristic clinical presentation, including the "dripping candle wax" sign.

This sign is characterized by a painful, warm, and indurated area resembling the shadow of a candle wax drip, extending from the lumbar spine to the lower limb. The dripping wax represents the dermatomes affected by the lumbar plexus.

**Why Each Wrong Option is Incorrect:**

A. Multiple Sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system (CNS), causing neurological symptoms and signs. MS does not present with the "dripping candle wax" sign due to its involvement in the CNS, not peripheral nerves.

B. Guillain-Barré Syndrome (GBS) is another autoimmune disorder that affects the peripheral nervous system, causing acute flaccid paralysis and various neurological symptoms. However, the "dripping candle wax" sign is not a typical feature of GBS.

C. B12 Deficiency is a condition affecting the peripheral nerves, but the "dripping candle wax" sign is not specific to this condition and is not a typical feature of B12 deficiency.

**Core Concept:** The "dripping candle wax" sign is specific to conditions involving the peripheral nerves or their distribution, such as lumbar plexus neuritis (option B).

**Why Each Wrong Option is Incorrect:**

A. Multiple Sclerosis (MS) is a chronic inflammatory demyelinating disease affecting the central nervous system (CNS), not the peripheral nervous system.

B. Guillain-Barré Syndrome (GBS) is an autoimmune disorder targeting the peripheral nervous system, leading to acute flaccid paralysis and various neurological symptoms. However, the "dripping candle wax" sign is not a typical feature of GBS.

C. B12 Deficiency is a condition affecting the peripheral nerves, but the "dripping candle wax" sign is not specific to this condition and is not a typical feature of B12 deficiency.

**Why the Correct Answer is Right:**

Dripping candle wax sign is a characteristic feature of lumbar plexus neuritis (option B) due to its involvement in the peripheral nerves or their distribution. When a patient with lumbar plexus neuritis presents