Limonoids belong to which terpene class?
Pick D: Triterpenes. Thinking through PSS- Sec G- Sec metabolites step by step rules out the lookalikes and leaves Triterpenes. Skip these: A) Monoterpenes; B) Sesquiterpenes; C) Diterpenes. 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.