The correct option is B White rust
Bacterial blight
Bacterial blight is caused by Pseudomonas syringae. The main symptom of this disease is the development of brown necrotic leaf spots with yellow halos.The disease is caused by sowing infected seed within a field.
White rust
White rust is a fungal disease caused by Albugo candida that mainly affects plants like cauliflower belonging to the genus Brassica. The symptoms of this disease are the appearance of white blisters on the infected plant part like leaves and stems. Pusa Swarnim is resistant to White rust and has a great drought tolerance capacity.
Curl and black rot
Curl blight black rot is a prevalent disease in cruciferous plants. It is a bacterial disease caused by the pathogen Xanthomonas campestris.
Mosaic virus
Mosaic viruses are a group of viruses that cause the leaves of infected plants to have a mottled appearance.