how many times

[azz]

a. How many times can he tell you the same kind of lie and you will believe him?
b. How many times can he tell you the same kind of lie with you believing him?
c. How many times can he tell you the same kind of lie and have you believe him?

Which of the above are grammatically correct?

I am pretty sure (c) works. I think (c) would probably work in informal English. (b) seems to suggest that the lying and the believing are happening at the same time, so I don't think it works.

Many thanks

[Alan]

All probably comprehensible in context but only (c) is suitable for formal use.