FRIGIDA (FRI) gene promotes flowering repression by:
That points to B: Activating FLC. Compared with the other options, Activating FLC is the one that correctly describes the VERNALIZATION & FLOWERING concept. The wrong ones are A) Repressing FLC; C) Activating FT; D) Repressing SOC1. 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.