IN SNAP APPLICATION PROCESS- if i select 3 programmes and make payment for only one programme now and make the payments for the remaining 2 later before college deadline? can i? and also can i add programmes after if i want to apart from these 3?

yes its totally fine , I made payment for sibm pune and scmhrd , and i will make payment latter for sibm banglore

yes, you can! even if you pay the initial exam fees, you can pay the college form fee even after 22 nov.
but one has to make sure of the college application deadlines.

not worried about the exam fee payment but selecting 3 programmes and making 1 payment now? like i'll select sibm pune, scmhrd, sibm bangalore and make payment for sibm pune only. the two ill make payment before dec7