Question

A. Tick (M) the correct option.
1. Which one of the following is not a characteristic of rocks?
(a) These are composed of mineral crystals.
(b) These have a definite mineral composition.
(c) These vary in hardness and colour.
(d) These form outermost shell of the earth.​

Answer 1

Explanation:

d

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Answer 2

Answer:

Option:B

These have a definite mineral composition