Correct option is B
Given: 648 : 8 :: ? : 12 :: 18 : 2
Logic: 2nd × (2nd + 1)2 = 1st number.
648 : 8 → 8 × (8+1)2 = 8 × 92 = 8 × 81 = 648
and 18 : 2 → 2 × (2+1)2 = 2 × 32 = 2 × 9 = 18
Similarly,
? :12 → 12 × (12+1)2 = 12 × 132 = 12 × 169 = 2028
Correct answer is (b) 2028.