Isn't the key wrong? I think it should be B

Isn’t the key wrong? I think it should be B

A child with increasing jaundice and pale stools. Choose the appropriate test:
a. Endomyseal antibodies
b. Sweat test
c. TFT
d. LFT
e. US
Ans. The key is E. US. [This is obstructive jaundice where US may show dilatation of common bile duct or stones].