Which of the following organisms cause yellow vein mosaic of okra?

Yellow vein mosaic of okra (Bhindi) is a viral disease caused by Bhendi yellow vein mosaic virus (BYVMV), a Geminivirus. It is transmitted by the whitefly Bemisia tabaci and causes characteristic yellow mosaic patterns on leaves, vein thickening, and stunted plant growth. Bacterial diseases include citrus canker or blight, fungal diseases include rusts and smuts, and protozoa do not typically affect plants.