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RAS:- Current Affairs-11 (in Hindi)
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Current affairs 2018 in detail with help of imp MCQs with brief Explanation. (in Hindi)

Yogesh kookana
Double M.A in History and Geography. 3yrs teaching experience in bhavisya classes.

Unacademy user
best explanation ma'am.....and plus i want to share an exciting fact that when we give energy to the electron it gets excited to go in upper energy level for the time of 10 raised to the power -9 second ,☺