CRY3 protein is localized primarily in:
Correct option is B, Chloroplasts and mitochondria. In cryptochrome problems like this, the accurate statement is Chloroplasts and mitochondria; the others are common mix-ups. Not these: A) Nucleus only; C) Plasma membrane; D) Cell wall. 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.