Osmotic pressure is the minimum pressure required to:
Pick C: Stop osmosis. Thinking through BASICS of PLANT step by step rules out the lookalikes and leaves Stop osmosis. Skip these: A) Increase osmosis; B) Initiate diffusion; D) Burst the cell. 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.