Class A and Class C genes show which interaction?
Pick C: Mutual antagonism. Thinking through ABC MODEL step by step rules out the lookalikes and leaves Mutual antagonism. Skip these: A) Synergistic; B) Independent; D) Co-dominance. 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.