Which of the following is a common feature of polymyositis?

Correct Answer: A

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

Correct Answer: A

Rationale: Rumination is not seen exclusively in infants and those with intellectual disability; it can occur in other populations as well.

Correct Answer: A

Rationale: Methotrexate primarily works by suppressing the immune system, reducing inflammation in rheumatoid arthritis.

Correct Answer: C

Rationale: Brain damage from drowning typically begins after 4-6 minutes of submersion, with significant damage occurring by 30 minutes due to anoxic injury and cerebral hypoxia.

Correct Answer: C

Rationale: Male gender, rather than female, is a known risk factor for asthma morbidity and mortality, particularly in childhood.