Spot the correct spelling of a metamorphic rock texture with large, conspicuous crystals.

The correct option is (b). The term Porphyroblastic is a correctly spelt geological adjective used for a metamorphic rock texture containing large, conspicuous crystals (porphyroblasts) embedded in a finer-grained matrix (Hindi meaning: बड़े क्रिस्टलों वाला कायांतरित शैल बनावट). The spelling follows the standard scientific root: porphyro- (large crystals) + -blastic (growth/formed). Example: Garnet schist often shows a porphyroblastic texture due to large garnet crystals. Why others are incorrect: The other options contain incorrect letter order or non-standard endings (such as misplaced vowels or incorrect suffix spelling), which do not match the accepted scientific spelling. Meanings of all the given options: Option A: Prephyroblastic – not a standard accepted spelling/term (Hindi meaning: अमान्य/गलत वर्तनी). Option B: Porphyroblastic – correct term for rocks with large porphyroblasts (Hindi meaning: बड़े क्रिस्टलयुक्त बनावट). Option C: Porfyrablastic – incorrect spelling (Hindi meaning: गलत वर्तनी). Option D: Porophyroblastik – incorrect spelling and non-standard ending (Hindi meaning: गलत वर्तनी). So the correct answer is (b)