Dear Sir / Ma'm, it must be noticed that for cracking the NEET UG, your concepts from the topics of class 11 should be very clear and strong. Without class 11th topics being strong, you won't be able to cope up with the topics of class 12th. My suggestion would be to read and keep revising your class 11th subjects and topics sidewise while preparing the class 12 topics. With sincerity and dedication, you will always be able to clear the NEET in 2020.