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191. 10 : 99 : : 1...

191. 10 : 99 : : 1

A

6 : 37

B

7 : 45

C

8 : 63

D

9 : 85

Text Solution

Verified by Experts

The correct Answer is:
C
`(10)^2` = 100, 100 - 1 = 99
Similarly
`(8)^2` = 64, 64 - 1 = 63
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