Which sentence is the correct one?

Enjoy, avail, absent ইত্যাদির পরে Object না থাকলে Object হিসেবে Reflexive Pronoun বসে। 
(ঘ)-তে Object আছে বিধায় এখানে (ঘ) শুদ্ধ।

বাকিগুলো শুদ্ধভাবে লিখলে-
- We enjoyed ourselves very much in the picnic.
- I should avail myself of the opportunity.
- The student absented himself from college.