This is the answer for your test hope it helps
Answer: None of the above
Step-by-step explanation:
Given


Now, integrating both sides



PART A :
A,B,C,D
Because if the spinner was spinning on time it would have either landed on any of the given parts a,b,c,d once
PART B:
A and B
They are equally likely to occur because both of them have a portion of 90 degrees.
Hopefully my answer helped :)