What would be the output of the following circuit, if a positive going unipolar pulse with an amplitude greater than $$V_ref$$, is applied at the input?

A

$$V_{o}$$ will go high momentarily and return to low

B

$$V_{o}$$ will go low momentarily and return to high

C

$$V_{o}$$ will go high and remain high

D

$$V_{o}$$ will not change its previous state