Correct option is D
Explanation-
A. Bacterial blight → III. Xanthomonas oryzae pv. oryzae
A well-known bacterial disease of rice which is caused by Xanthomonas oryzae pv. oryzae. It leads to yellowing and drying of leaves
B. Grain rot → V. Burkholderia glumae
Grain rot, especially during flowering and grain filling stages , caused by Burkholderia glumae, a bacterium and results in discolored, rotten, and shriveled grains
C. Sheath blight → II. Rhizoctonia solani
This is common fungal disease in rice which is caused by Rhizoctonia solani. It affects sheath and lower leaves with lesions
D. Leaf smut → I. Entyloma oryzae
A fungal disease producing dark smut-like spots on leaves, caused by Entyloma oryzae
E. Downy mildew → IV. Sclerophthora macrospora
Though more common in maize and sorghum, it can affect rice too, caused by Sclerophthora macrospora (an oomycete, not a true fungus)
Correct Answer: A - III, B - V, C - II, D - I, E - IV - Option d
