Select the option in which the numbers share the same relationship as that shared by the given pairs of numbers.

2513 − 20;

4213 − 18

Given: 2513 − 20, 4213 − 18

2513 − 20

Sum of digits of 2513 = 11 → 11 × 2 - 2 = 20 

4213 − 18

Sum of digits of 4213 = 10 → 10 × 2 - 2 = 18 

Logic:  Sum of digits of the first number × 2 - 2

Option A: 3122 → 3+1+2+2 = 8 → 8×2 - 2 = 14 (Correct).

Option B: 2521 → 2+5+2+1 = 10 → 10×2 - 2 = 18 (Incorrect).

Option C: 5131 → 5+1+3+1 = 10 → 10×2 - 2 = 18 (Incorrect).

Option D: 1462 → 1+4+6+2 = 13 → 13×2 - 2 = 24 (Incorrect).

Thus, correct option is (a)