phot2 mutant lacks:
That points to B: Avoidance response. Compared with the other options, Avoidance response is the one that correctly describes the Phototropin+All concept. The wrong ones are A) Accumulation response; C) Phototropism completely; D) Auxin transport. 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.