The measure of a certain arc is 90° What is the measure of the arc in radians?

A) 3PI/4
B) PI/2
C) PI
D) 3PI/2

C)PI is the answer because it fits better

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.