Correct Answer: JJRUCF

Solution : Given:
LABOUR is written as XZSECM and GAINED is written as JJRLCH.

Reverse the letters of LABOUR and then add consecutive numbers to the place value of each letter to obtain the required code –
LABOUR→RUOBAL
Now, add consecutive numbers – R + 6 = X; U + 5 = Z; O + 4 = S; B + 3 = E; A + 2 = C; L + 1 = M
Thus, LABOUR is coded as XZSECM.
And, GAINED is written as JJRLCH –
GAINED→DENIAG
Now, add consecutive numbers – D + 6 = J; E + 5 = J; N + 4 = R; I + 3 = L; A + 2 = C; G + 1 = H
Similarly, follow the same pattern for EARNED –
EARNED→DENRAE
Now, add consecutive numbers – D + 6 = J; E + 5 = J; N + 4 = R; R + 3 = U; A + 2 = C; E + 1 = F

Thus, EARNED is related to JJRUCF. Hence, the first option is correct.