If Local Apparent Time equals Local Mean Time, the equation of time is:

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Multiple Choice

If Local Apparent Time equals Local Mean Time, the equation of time is:

Explanation:
The equation of time is the difference between Local Apparent Time (solar time) and Local Mean Time (clock time). When Local Apparent Time equals Local Mean Time, there is no difference between the two, so the equation of time is zero. In other words, there is no offset between sundial time and clock time at that moment. The other numbers would imply a half-day or full-day offset, which isn’t the case when the two times coincide. (In practice, the equation of time is usually expressed in minutes and crosses zero several times a year.)

The equation of time is the difference between Local Apparent Time (solar time) and Local Mean Time (clock time). When Local Apparent Time equals Local Mean Time, there is no difference between the two, so the equation of time is zero. In other words, there is no offset between sundial time and clock time at that moment. The other numbers would imply a half-day or full-day offset, which isn’t the case when the two times coincide. (In practice, the equation of time is usually expressed in minutes and crosses zero several times a year.)

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