Hello Anil,
Yes,It is compulsory to have mathematics in 10+2 in order to apply in IIT JAM with Geology.
In graduation you should have geology as a subject and any 2 subject among Physics,Chemiistry and Maths.
So,if you don't have maths in 12 you are not eligible to applyin IIT JAM with Geology.
Hope it Helps.
Thank you.
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