Hii Ishika!
The function of ciliary process is to secrete Aqueous humor in the posterior chamber. So, the correct option would be (c). The aqueous humor then, flows into the anterior chamber through pupil. The ciliary process has three functions, accomodation, aqueous humor production and resorption. Also, maintenance of lens zonules, to hold the lenses on place.
Hope this helps.
Good luck!