The gene NPH1 was later renamed as:
Pick C: PHOT1. Thinking through Phototropin+All step by step rules out the lookalikes and leaves PHOT1. Skip these: A) PHOT2; B) CRY1; D) ZTL. 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.