One of the following is not a screening test for a child with bleeding tendency:

Correct Answer: C

Rationale: Thrombin time is not commonly used as an initial screening test for bleeding disorders; instead, PT, PTT, and bleeding time are more relevant.

Correct Answer: D

Rationale: Aspirin is not a common cause of serum sickness, unlike the other options listed.

Correct Answer: B

Rationale: Look-Listen-Feel is a primary assessment step in BLS to check for effective breathing before initiating rescue breaths or CPR.

Correct Answer: B

Rationale: Diarrhea leads to metabolic acidosis with a normal anion gap due to excessive bicarbonate loss in stool. This type of acidosis is known as hyperchloremic acidosis, where chloride replaces lost bicarbonate.

Correct Answer: C

Rationale: Pseudoephedrine is a nasal decongestant that relieves congestion by vasoconstriction.