Correct Answer: 225

Solution : Given:
ABCDE is coded as 45 and OPQR is coded as 198.

ABCDE is coded as 45; A→1; B→2; C→3; D→4; E→5
Add all the place values to get the sum→1 + 2 + 3+ 4 + 5 = 15
Now, multiply the sum by 3→15 * 3 = 45

OPQR is coded as 198; O→15; P→16; Q→17; R→18
Add all the place values to get the sum→15 + 16 + 17 + 18 = 66
Now, multiply the sum by 3→66 * 3 = 198

Similarly, for XYZ; X→24; Y→25; Z→26
Add all the place values to get the sum→24 + 25 + 26 = 75
Now, multiply the sum by 3→75 * 3 = 225

So, XYZ is coded as 225. Hence, the fourth option is correct.