Sir im doing bsc and I want todo mba after but my friends suggesting me to leave bsc and do btech as prefrence is given btech students

If you are planning for MBA, it does not matter. Do no listen to anybody who claims themselves as an expert. Is your friend an industry professional involved in hiring. See, there are very few, handful organisation who prefer a B.Tech + MBA that's too from top institute but majorly, it does not affe

BSC is good option many students go for BSC as Btech beause there si also good scope in BSC you can make career in any one in physics, chemistry or maths and you can go for MBA after BSC