Which of the following is a hallmark feature of polymyalgia rheumatica?

Correct Answer: A

Rationale: Polymyalgia rheumatica is characterized by shoulder and hip pain, often accompanied by stiffness.

Correct Answer: C

Rationale: In major trauma, cell lysis releases intracellular potassium into the blood, leading to hyperkalemia without an actual increase in total body potassium.

Correct Answer: D

Rationale: Truancy is not a recognized feature of ASD.

Correct Answer: A

Rationale: Polymyositis is primarily characterized by muscle weakness without the rash seen in dermatomyositis.

Correct Answer: D

Rationale: Pulmonary fibrosis is not commonly associated with allopurinol, whereas severe skin reactions like SJS and TEN are known side effects.