Rajasthan Police Constable Model Paper 1

Given series: 13G169, 10H100, 7I49, 4J16, ?The logic followed for the letter is:
G + 1 → H; H + 1 → I; I + 1 → J; J + 1 → K
For the $1^{\mathit{s}}\mathit{t}$ number:
13
13 – 3 = 10
10 – 3 = 7
7 – 3 = 4
4 – 3 = 1
The logic followed for the 2nd
number:

Hence, the next term will be 1K1