**Core Concept**
The clinical presentation of boggy swelling and easily pluckable hair in a child is suggestive of a condition involving inflammation and destruction of the hair follicle and surrounding tissue.

**Why the Correct Answer is Right**
The probable diagnosis is a case of Folliculitis Decalvans, a rare inflammatory scalp condition characterized by boggy swelling, hair loss, and easily pluckable hair. It is thought to be caused by the overgrowth of Malassezia yeast and Staphylococcus aureus bacteria, leading to an intense inflammatory response that destroys the hair follicle and surrounding tissue. The condition is often associated with an increased risk of secondary bacterial infections.

**Why Each Wrong Option is Incorrect**
**Option A:** Psoriasis is a chronic skin condition characterized by thick, scaly plaques, not boggy swelling or easily pluckable hair.

**Option B:** Tinea capitis is a fungal infection of the scalp, but it typically presents with circular patches of hair loss, not boggy swelling.

**Option C:** Alopecia areata is an autoimmune condition that causes patchy hair loss, but it does not typically involve boggy swelling or easily pluckable hair.

**Clinical Pearl / High-Yield Fact**
Folliculitis Decalvans is a rare but important diagnosis to consider in children presenting with boggy swelling and hair loss, as it requires prompt treatment to prevent scarring and further hair loss.

**Correct Answer:** C.