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1, 5, 21, 57, 121, ?...

1, 5, 21, 57, 121, ?

A

150

B

176

C

200

D

221

लिखित उत्तर

Verified by Experts

The correct Answer is:
D
`1+(2)^2=5`
`5+(4)^2=21`
`21+(6)^2=57`
`57+(8)^2=121`
`121+(10)^2=221`
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