Pick up the correct statement from the following: A. Hornblende mineral is brittle B. Muscovite is also known as white mica and potash mica C. Biotite is also known as black-mica D. All the above

The correct answer is D. All the above.

Hornblende is a brittle mineral that is found in igneous and metamorphic rocks. It is a member of the amphibole group of minerals, and it is typically black or green in color. Muscovite is a white or silvery-white mica that is found in igneous, metamorphic, and sedimentary rocks. It is a member of the mica group of minerals, and it is typically transparent or translucent. Biotite is a black or dark brown mica that is found in igneous, metamorphic, and sedimentary rocks. It is a member of the mica group of minerals, and it is typically opaque.

Here is a brief explanation of each option:

• Option A: Hornblende mineral is brittle. This is true. Hornblende is a brittle mineral that is found in igneous and metamorphic rocks. It is a member of the amphibole group of minerals, and it is typically black or green in color.
• Option B: Muscovite is also known as white mica and potash mica. This is true. Muscovite is a white or silvery-white mica that is found in igneous, metamorphic, and sedimentary rocks. It is a member of the mica group of minerals, and it is typically transparent or translucent.
• Option C: Biotite is also known as black-mica. This is true. Biotite is a black or dark brown mica that is found in igneous, metamorphic, and sedimentary rocks. It is a member of the mica group of minerals, and it is typically opaque.