I am from commerce background. Can I get admission in B.Tech? Please give me an answer.

Yes, you can pursue B.Tech, if you are keenly aspire (forget your + 2 commerce). With your class 10th board qualification, you can appear JEE for polytechnic Diploma and after completion of 3 years diploma engineering, you can try for Lateral entry for B.Tech in 2nd year. Yes, it consumes time, but

No, you can't. Since, for B.Tech, you must opt for PCM in class 11th. Since the eligibility criteria is PCM with any other optional subject and minimum of 55% marks in class 12th (depend on University) for B.Tech exam.

No, you can't get admission in the B.Tech with the Commerce as background. For that, you need to have physics and Maths as your subject in class 12th.