Q. A melanocratic porphyritic rock containing phenocrysts of biotite, with feldspar restricted to the groundmass, is called
(A) trachyte. (B) dacite. (C) andesite. (D) lamprophyre.
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
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