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Complete the series: 11, 31, 69, 131, 223, ?

a) 257 b) 351 c) 349 d) 231

$2^{3} + 3 = 11$

$3^{3} + 4 = 31$

$4^{3} + 5 = 69$

$5^{3} + 6 = 131$

$6^{3} + 7 = 223$

$7^{3} + 8 =351$

Hence,Option$(b)351$ is the correct choice.

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