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Question

Pick up the polymineralic rock from the following:

निम्नलिखित में से बहुखनिज चट्टान चुनें:
A.

Quartz sand

B.

Pure gypsum

C.

Magnesite

D.

Granite

Answer ( Option D)

Granite

Solution

Granite is a polymineralic rock, meaning it is composed of multiple minerals. 
The key minerals in granite are quartz, feldspar, and mica, which combine to give granite its characteristic appearance and properties.
Quartz sand is primarily monomineralic, made almost entirely of quartz.
Pure gypsum consists mainly of the mineral gypsum, so it is also monomineralic.
Magnesite is a single mineral rock composed of magnesium carbonate, making it monomineralic as well.

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