Kaalkabir, have you ever heard of something called attention deficit disorder in your country? In our country, USA, this is a learning disability where people have trouble paying attention, get distracted easily, have trouble staying on task, focusing when reading, sitting still to study or read/write. There is medication that helps people focus.

If not, my advice would be to try to study in short bursts of time - 20 minutes to a half hour at a time, then take a break. Force yourself to study, then take a five minute break. See if that works - that's what I have to do - I have a very short attention span - and it works for me (I'm a full time psychology student)

Good luck - please post again and let us know how you're doing