Transmembrane pathway requires water to cross membranes:
Pick C: Multiple times. Thinking through WATER TRANSPORT step by step rules out the lookalikes and leaves Multiple times. Skip these: A) Once; B) Twice; D) Not at all. 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.