The most common type of relapse in acute leukemia is:

Correct Answer: B

Rationale: Medullary relapse, or recurrence of leukemia in the bone marrow, is the most common form of relapse in acute leukemia, requiring additional chemotherapy.

Correct Answer: A

Rationale: Lidocaine, naloxone, atropine, and epinephrine (L-N-A-E) can be administered via endotracheal tube in emergency situations.

Correct Answer: C

Rationale: Hirschsprung disease is caused by the absence of ganglion cells in the distal colon, leading to functional obstruction, delayed meconium passage, and bilious vomiting. Diagnosis is confirmed with a rectal biopsy.

Correct Answer: B

Rationale: Medullary relapse, or recurrence of leukemia in the bone marrow, is the most common form of relapse in acute leukemia, requiring additional chemotherapy.

Correct Answer: D

Rationale: Truancy is not a recognized feature of ASD.