Which of the following are in correct order from greatest to least?

Convert the radian measures to degrees: π/2 = 90°, 2π/3 = 120°, 7π/6 = 210°, and 5π/3 = 300°. In descending order with 330°, they are 330°, 300°, 210°, 120°, and 90°. This matches choice D.

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