Juglone shows which activity?
That points to B: Allelopathy. Compared with the other options, Allelopathy is the one that correctly describes the PLANT SEC METABOLITES concept. The wrong ones are A) Anticoagulant; C) Insecticidal; D) Hormonal. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.