β-thioglucosidases (myrosinases) hydrolyze:
Correct option is C, Glucosinolates. In PSS- Sec G- Sec metabolites problems like this, the accurate statement is Glucosinolates; the others are common mix-ups. Not these: A) Alkaloids; B) Terpenoids; D) Phenolics. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.