which of the folling items represents a symption? abdominal pain.or heme-negative stool

Answer 1

What exactly are you refering to? Pseudomembranous colitis?
Please be more specific & correct your spelling. However, abdominal pain is a symptom of above disease, so abdominal pain, if that's any help.
And what do you mean by heme-negative stool?

Answer 2

And what do you mean by heme-negative stool?

Presumably haeme negative? I.e. no blood in the stool? If so this is not a symptom.