SSC JE Civil Engineering 30-Oct-2020 Shift 1 Paper

The logic follows here is : 2nd number is divisible by 1st number and 4th number is divisible by 3rd number.
For,
12 : 84 → 84 is divisible by 12.
Similarly,
For, 24 : ?
'312' is divisible by 24.
So, only option (1) is follow this logic and other 3 options are not follow this logic.
'312' is related to the third number in the same way as the second number is related to the first number.
Hence, "312" is the correct answer.