By what age does the posterior fontanel usually close?

Correct Answer: A

Rationale: The correct answer is A because the bones surrounding the posterior fontanel typically fuse and close by age 6 to 8 weeks. This closure is a normal part of infant development.

Correct Answer: C

Rationale: The Look-Listen-Feel technique is used to assess breathing by observing chest movement, listening for breath sounds, and feeling for airflow.

Correct Answer: A

Rationale: Automation can lead to job displacement as machines replace human workers in various industries, particularly those involving repetitive tasks.

Correct Answer: C

Rationale: For pulseless ventricular tachycardia, initial defibrillation with 4J/kg is recommended for effective resuscitation.

Correct Answer: A

Rationale: Isoniazid is a known cause of drug-induced systemic lupus erythematosus.