Platelet count rise at what time of menstrual cycle?

# During menstrual cycle, platelet count rise at what time ?
A. Following ovulation
B. At the onset of menses
C. After completion of menstrual flow
D. Before ovulation

The correct answer is A. Following ovulation.

Platelet count varies in menstrual cycle, rising following ovulation & falling at onset of menses.
Ref: Harrison’s 16th Ed. 673