When administering an I.M. injection to an infant, the nurse in charge should use which site?

Correct Answer: D

Rationale: The vastus lateralis (D) is the preferred IM site in infants due to its large muscle mass and lack of major nerves or vessels. Deltoid (A) is too small, dorsogluteal (B) risks sciatic injury, and ventrogluteal (C) is less developed.

Correct Answer: B

Rationale: Pseudomembranous colitis is caused by Clostridium difficile (B) overgrowth, often post-antibiotics. Tetanus (A) affects nerves, H. pylori (C) causes ulcers, and E. coli (D) causes other infections.

Correct Answer: C

Rationale: Cheyne-Stokes respiration (C) is a cyclic breathing pattern seen near death. Rigor mortis (A) occurs post-mortem, Kussmaul (B) is metabolic acidosis-related, and tachycardia (D) is nonspecific.

Correct Answer: B

Rationale: World Malaria Day is April 25 (B), raising awareness about malaria prevention.

Correct Answer: C

Rationale: Thrombocytopenia (low platelets) increases bleeding risk; applying pressure for 5 minutes post-injection (C) prevents hematoma. Heat (A) or massage (D) worsens bleeding, and cleansing (B) is routine but not specific.