The LMT of sunrise on the standard meridian is 0552. Your longitude is 99°15'E. What is your ZT of sunrise?

Correct Answer: Option D — 0615

Zone Time is derived by applying longitude time correction to Local Mean Time. At 99°15'E longitude, the time zone is GMT+7. Applying the algebraic difference between local standard meridian and zone description yields a ZT of 0615.