Sigatoka leaf spot is a major fungal disease of Banana, Club root (caused by Plasmodiophora brassicae) affects Cauliflower and other crucifer crops, Black wart (caused by Synchytrium endobioticum) is a serious quarantine disease of Potato, and Whip smut is a well-known disease of Sugarcane that produces its characteristic whip-like black smut structure.
Putting these pairs together, Sigatoka goes with Banana, Club root with Cauliflower, Black wart with Potato, and Whip smut with Sugarcane, which is exactly what option 3 lists.