All angles are right angles or a triangle has 4 sides.
a. conjunction
b. disjunction
c. negation
d. conditional

You know it's not a negation since nothing is being negated. 

You know it's not a conditional because neither statement is reliant on the other to be true or false.

So, the answer must be a or b.

A conjunction implies there is an and which there is not. The solution then must be b. Disjunction, and it is indeed since disjunctions are the "or" statements of logic.

The answer to your question is d 68%