Unpredictable drug reactions include

Correct Answer: D

Rationale: Allergic reactions are unpredictable and not dose-dependent, unlike drug toxicity and interactions.

Correct Answer: D

Rationale: A foreign body in the left main bronchus leads to air trapping on the left side, causing hyperinflation and shifting the mediastinum to the right on expiration. This results from a ball-valve effect, where air enters but cannot exit fully.

Correct Answer: A

Rationale: Diabetic mothers are more prone to polyhydramnios (excess amniotic fluid) rather than oligohydramnios (low amniotic fluid). Preeclampsia, pyelonephritis, and preterm labor are commonly associated with diabetes in pregnancy.

Correct Answer: C

Rationale: Acute leukemia commonly presents with fever (due to infections), pallor (from anemia), and purpura (from thrombocytopenia). Bone pain and lymphadenopathy are also common but not as defining as this triad.

Correct Answer: A

Rationale: Repeated exposure to ophthalmic medications can lead to contact allergy, characterized by redness, swelling, and itching.