Match the preparation procedure with the following examinations

a. Low-residue diet for 2 to 3 days before the examination, followed by a clear liq-uid diet 1 day before the examination, laxative the afternoon before the examina-tion, and a suppository or cleaning enema the morning of the examination
b. Nothing by mouth (NPO) after midnight or at least 8 hours before the examina-tion and avoidance of gum and tobacco products before the procedure
c. No preparation
d. Low-residue diet for 1 to 2 days before the examination, NPO after midnight or at least 8 hours before the examination, and avoidance of gum and tobacco prod-ucts before the examination

1. Esophagus

2. Stomach

3. Small intestine

4. Large intestine

1. ANS: C
2. ANS: B
3. ANS: D
4. ANS: A