Question

a granite sample contains mm sized mineral grains of quartz, alakli felspar, plagioclase felspar, and biotite. which of the following statements is best applied to it.
monomineralic and monocrystalline
polymineralic and monocrystalline
polymineralic and polycrystalline
monomineralic and polycrystalline
monorail and polywantsacracker

Explanation:

1. First, analyze "polymineralic" vs "monomineralic": The granite sample has multiple minerals (quartz, alkali felspar, plagioclase felspar, biotite), so it is polymineralic (not monomineralic, which would have one mineral).
2. Then, analyze "polycrystalline" vs "monocrystalline": Granite is an aggregate of many mineral crystals (grains), so it is polycrystalline (monocrystalline would be a single crystal, which granite is not).
3. The last option is nonsensical, so we eliminate it. Among the valid options, only "polymineralic and polycrystalline" fits.

Answer:

polymineralic and polycrystalline