The incorrect statement regarding corticosteroids in allergy is:

Correct Answer: A

Rationale: The mechanism of corticosteroids is well understood; they modulate immune response by suppressing inflammation through inhibition of cytokines and prostaglandins.

Correct Answer: B

Rationale: Physiologic jaundice typically appears between and 7 hours after birth and increases by less than 5 mg/dL per day in the first few days

Correct Answer: A

Rationale: The mechanism of corticosteroids is well understood; they modulate immune response by suppressing inflammation through inhibition of cytokines and prostaglandins.

Correct Answer: B

Rationale: Cephalohematoma does not extend across suture lines due to the periosteal attachment. The other statements are true regarding cephalohematoma.

Correct Answer: C

Rationale: NSAIDs are common causes of fixed drug eruptions, which present as recurring skin lesions at the same site.