Can I pursue MBA in aviation after completing B.Tech In IT?

Yes, you can. Aviation industry has wide scope and great pay scales. But, the institute that you choose is very important, so be careful with the selection. Choose the one that has excellent placement services, otherwise getting a good job might be very difficult for you and it can be hectic and was

Yes, of course you can pursue aviation, but select a good institution so that you could be easily placed in.