Does OTBA chapter come in the rest of the 80 marks paper ? Share with your friends Share 1 Taruna Singhal answered this Dear student, For any such information, kindly refer to the official CBSE website. Regards 0 View Full Answer Neha answered this nope. there is another section for OTBA and it consists of only 10 marks. at least that is what i read in the guide. 0