Correct Answer: B

Rationale: Placenta previa is characterized by painless vaginal bleeding, particularly in the second or third trimester.

Correct Answer: D

Rationale: While family history, disability, and stroke are common risk factors, a history of myocardial infarction is less commonly associated with late-life depression.

Correct Answer: B

Rationale: Tinea versicolor presents with tan patches, often with a fine scale.

Correct Answer: C

Rationale: Moisture is not typically a factor in nail evaluation; the focus is more on condition, length, and clubbing.

Correct Answer: B

Rationale: Phenazopyridine can cause methemoglobinemia and hemolytic anemia if overused.