Non-reducing sugars are preferred for phloem transport because they are:
Pick B: Less reactive. Thinking through PSS- Sec-F-Transport step by step rules out the lookalikes and leaves Less reactive. Skip these: A) Highly reactive; C) Less soluble; D) Energy rich. 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.