Which of the following is not true about plagioclase? Options: A . &nbspIt is composed of K mainly B . &nbspIt is composed of either Na, Ca, or Al C . &nbspIt is of massive or crystalline structure D . &nbspIt gives 2 sets of cleavages

Which of the following is not true about plagioclase?

Question

Which of the following is not true about plagioclase?

Options:

A . It is composed of K mainly

B . It is composed of either Na, Ca, or Al

C . It is of massive or crystalline structure

D . It gives 2 sets of cleavages

Answer: Option A
Answer: (a).It is composed of K mainly

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