Correct option is D
Given:
Time taken to complete round by A = 252 second
Time taken to complete round by B = 308 second
Time taken to complete round by C = 198 second
Calculation:
LCM of 252, 308 and 198
252 = 2×2×3×3×7
308 = 2×2×7×11
198 = 2×3×3×11
LCM = 2×2×3×3×7×11= 2772
2772 minutes = 46 minutes 12 seconds
Therefore, they meet again after 46 minutes 12 seconds letter.