Hi Mudit,

First of all buy a Previous year question paper book which should contain at least 5-10 year questions. At least revise the Previous year question 50 times, i am saying this bcz in 2019 out of 50 questions about 25- 30 were directly from previous year question papers (Last 20years).

Study about France , Germany, Spain and Russia from Wikipedia again and again so that u can remember everything and believe the remaining 20–22 questions were from Wikipedia. For other clusters follow the same.

English - Basic grammatical Rules, Vocabs, Reading Comprehension and passage. Read the editorials and additional articles of The Hindu.

Hope this will help,please feel free to ask if you have any further queries.

Thank You.