Apoplastic transport mainly occurs through:
Pick C: Cell wall. Thinking through PSS- Sec-F-Transport step by step rules out the lookalikes and leaves Cell wall. Skip these: A) Plasmodesmata; B) Cytoplasm; D) Vacuole. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.