Of the below molecules (A through E), which is/are:. (a) An optically active compound that is oxidized by MnO2 to an optically inactive compound. E A D C B
(b) An optically active compound that is oxidized by MnO2 to an optically active compound. C E D A B
(c) An optically inactive compound that is oxidized by MnO2 to an optically inactive compound. B A E C D
(d) A compound that is not oxidized by MnO2 . A C B D E

answer; i do believe the correct answer is (river); /// good luck

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

he would use the colour black