You need an official transcript from the University which awarded that degree… Official transcript in a sealed envelope and signed or stamped even outside the envelope…
Either University can send the sealed envelope directly to WES or you can take it from them and then courier it to WES without opening it …
Also you need to submit a photo copy of final degree…it can be sent separately by you if University is sending ur transcript directly to wes or if you are sending transcript yourself then put both sealed transcript and degree photocopy (alongwith any other documents required) in a bigger envelope… Also you can put both of sealed envelopes for mca and bachelor’s together with each of degree photocopy and other docs if any in a single larger envelope and then just send that larger envelope to WES using courier or post