Shortest phase of sexual cycle?

Shortest phase of sexual cycle?
a) Excitement phase
b) Plateu phase
c) Orgasmic phase
d) Resolution
Correct Answer - C
Ans. C. Orgasmic phase
[Ref Oxford textbook of psychiatry p.227]
Orgasm phase:
Premature ejaculation occurs in this phase
Reflexive muscle contraction occurs in pelvis
It is the shortest phase and lasts only a few seconds