question: loan vs emi vs revolving credit on cc

[ltf4ever]

i have idfc wealth cc with 9% apr. I was thinking of putting this low cc rate to good use.

i have never taken any loan or emi or even revolved money on credit card, so want to ask a few calculations from everyone here:

suppose i want to buy a car pricing 10 lakhs. which of these would make more sense?:
1. if i pay using cc, pay minimum payment due and revolve the credit to next x months. i will also earn 2.5% reward points.
2. use cc and convert the purchase into emi for next x months. what rate will be applied effectively and will i lose reward points?
3. take a car loan for x months.

please also include any processing charges, gst, etc to get the least costly option.

 

[ltf4ever]

thanks for the detailed explanation. i was not aware of the dynamic nature of apr, and at least thought that it would remain the same for a purchase.