Floral quartet model involves formation of:
C fits best: Tetramers. Keep the ABC MODEL basics straight and Tetramers stands out as the precise answer. Avoid: A) Dimers; B) Trimers; D) Pentamers. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.