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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Deepak singh 1 Best Answer
Refer attached option a is correct
please tell me why I don't get the same result if I do it in the exact method?
or tell me my mistake?
your method is also correct . We are getting same answer from your method also , but at last step you have done some mistake ..
thank you Deepak sir!