Hey there

Getting 150+ is a little tough you start preparing from now honestly. See if you have atleast prepared good for boards and know basic PCM then you can get 150+ which requires hard work. First you need to memorize the whole NCERT of chemistry thoroughly. If you had done coachings then revise the notes properly and solve as many questions as you can from chemistry make it your strong subject because it's scoring and can give you 60+ easily if you'll be honest with the subject. Then maths is also scoring for that solve rd Sharma, coaching notes and materials and advance previous year questions. Same for physics. In physics 12th portion is important as it will come in boards also. Rotation is important. But Careers360 has launched a wonderful platform which you can use to get 150+ in April exam if you follow the platform whole heartedly.
Check the link
https://www.google.com/url?sa=t&source=web&rct=j&url=https://learn.careers360.com/knockout-jee-main-april/&ved=2ahUKEwiO4pPYv7HlAhXTmuYKHWDMCk0QFjAKegQIARAB&usg=AOvVaw3XS9X1Sxkryg5E8liFJ_4C&cshid=1571803366019
Good luck

Check the link for any help

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/how-prepare-for-jee-main/amp&ved=2ahUKEwjlo5fp0LDlAhVai3AKHd-hCo0QFjACegQIDhAN&usg=AOvVaw3Z7NdP7fa5fX0xv1cPh8w7&ampcf=1

Good luck

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