Which of the following numbers is a perfect cube?

From the prime factorization of 121, we get,

121 = 11 × 11

169 = 13 × 13

196 = 2 × 2 × 7 × 7 = 14 × 14

216 = 2 × 2 × 2 × 3 × 3 × 3 = 2 × 3 = 6

Hence, in case of 216 perfect triplet pairs of 2’s and 3’s is formed, so 216 is a perfect cube.