UKMLA PLAB AMC USMLE Prometric MCQ

Question Number 0786

Question:
An eight month old infant develops a cough and hematemesis. He refuses food and is noted to have constant drooling. The most appropriate investigation at this stage would be:

a) Apt test
b) frontal radiograph that includes the neck, chest and entire abdomen
c) 24 hr esophageal pH probe test
d) CT abdomen
e) ultrasound of the abdomen