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General Science for RRB JE, NTPC Exam : Part 45 (in Hindi)
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Hemant Mishra
Cleared RRB Clerk , SBI Clerk pre, NTPC 2016, 1 year experience in software developing along with 5 year Experience in Teaching .

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Unacademy user
wow super ma'am keep motivated us
incident travel rare to denser than refraction angle move towards the perpendicular i thnk option a is right answer please clear