He is intent ____ passing the examination, but I’m doubtful about his chances.
A. with
B. on
C. to
D. about

Note: I usually use “intent” as a verb, this usage is new to me. Do you think there is a mistake in the question? If not, what do you think the answer is? ThanksDo you think "IS" should be the verb and not "intent"?

Question

He is intent ____ passing the examination, but I’m doubtful about his chances.
A.	with
B.	on
C.	to
D.	about

Note: I usually use “intent” as a verb, this usage is new to me. Do you think there is a mistake in the question? If not, what do you think the answer is? ThanksDo you think "IS" should be the verb and not "intent"?

Answer

"Intent on" is to be focused on a purpose

Answer

I found some examples of using "intent" as an adjective. 
http://www.thefreedictionary.com/intent

Answer

Oh.. yes, thanks Mojave, that was exactly my question, I have never used "intent" as an adjective before, that was why I suspect it was a mistake. Cool! Thanks for clarifying!

Answer

"Intent" is an adjective as well, and that is how it is being used in this sentence. "Intent on" is correct, as SteveMP pointed out below.