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: C

Rationale: Cardiac arrhythmias are less common in JDM.

Correct Answer: B

Rationale: Intrauterine growth retardation is not typically associated with polycythemia

Correct Answer: A

Rationale: Serious illnesses often cause compensatory responses like tachycardia and increased respiratory rate, but blood pressure may not necessarily rise, especially in shock.

Correct Answer: A

Rationale: The Modified Duke criteria include positive blood cultures for typical organisms (such as Staph aureus) as a major diagnostic criterion for infective endocarditis.

Correct Answer: C

Rationale: A bag-valve mask (Ambu bag) can be used with room air or supplemental oxygen for ventilation.

Correct Answer: A

Rationale: Skin tests are the most effective and commonly used method to detect specific allergens, offering high sensitivity and immediate results compared to blood tests.

Correct Answer: C

Rationale: Epstein-Barr virus and other infections can cause non-IgE-mediated urticaria through immune complex formation and cytokine release.

Correct Answer: D

Rationale: Hydrocortisone is a low-potency steroid often used for mild cases.