Concept:Zaid crops are short-duration crops grown in the hot summer months (March to June) between the Rabi and Kharif seasons, requiring irrigation.Explanation:Among the given options:- Gram is a Rabi crop (sown in winter, harvested in spring).- Fodder crops are grown as Zaid crops during the summer season.- Mustard is a Rabi crop.- Cotton is a Kharif crop (sown with monsoon rains).Thus, only Fodder belongs to the Zaid category.Answer:Option B – Fodder