Dear, draw fully labeled diagram, if time permits, do the delicate job. Say, if you are attempting Geography question, and you have to draw, 5 diagrams per question. Also when you have to attempt 4 subjective questions, it means 5x4=20 diagrams. Now, it awfully difficult for any body to draw diagrams with all the delicate details. And, yes practice makes a man perfect.

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" None are more hopelessly enslaved, than those, who falsely believe that they are free"
Goethe