Which factor affects food security?

Correct Answer: C

Rationale: Climate change poses a major threat to food security by affecting crop yields and causing extreme weather events that disrupt agriculture.

Correct Answer: D

Rationale: Uncompensated respiratory alkalosis occurs when excessive breathing reduces CO2 levels, raising pH. Bicarbonate remains normal in the acute phase before renal compensation.

Correct Answer: B

Rationale: Persistent allergic rhinitis is characterized by more frequent and troublesome symptoms that impact daily life, distinguishing it from intermittent cases, which occur less frequently.

Correct Answer: B

Rationale: Rh incompatibility does not 'never' occur in first-born infants. While it is less common, sensitization can occur during delivery or other events in the first pregnancy, leading to hemolytic disease in the first-born infant.

Correct Answer: A

Rationale: Obstructive shock is due to mechanical obstructions such as cardiac tamponade or pulmonary embolism.