Answer:
(C)

Explanation:
Given: It is given that angle MON is a straight angle and OP is bisects angle MOQ.
To find: The measure of the angle MOP.
Solution: It is given that angle MON is a straight angle and OP is bisects angle MOQ.
Thus, using the straight line property, we get


Substituting the given values, we get



Hence, option (C) is correct.