Hello dear student !

If your interest is high in doing MA after BSc. , then I'll  recommend  you to just go for it as after certain age you'll  not be much interested  in the same so you should go for it. Meanwhile  , for MPPSC what you can do is just prepare well along with doing MA. Take admission  in MA and side by side prepare for MPPSC and appear for it when you feel your preparations  are well. But if you feel that you  made a flow in preparing for MPPSC and any further study may disturb you, then just don't  go for MA and focus only on MPPSC.

hope this will help you!