If class A genes are mutated, which organs are absent?
Pick A: Sepals and petals. Thinking through ABC MODEL step by step rules out the lookalikes and leaves Sepals and petals. Skip these: B) Petals and stamens; C) Stamens and carpels; D) Sepals and carpels. 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.