Question

Match List I with List II

• A. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• B. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• C. (A)-(IV), (B)-(I), (C)-(III), (D)-(II)
• D. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Hint:

Tungro is a "complex" of two viruses: Bacilliform (DNA) and Spherical (RNA). Rice Ragged Stunt is a Reovirus (always dsRNA).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Plant viruses are classified by their shape (morphology) and their genetic material (DNA or RNA, single-stranded or double-stranded).
Detailed Explanation:
1. Rice Ragged Stunt Virus (A): This belongs to the genus Oryzavirus (Family Reoviridae).
Reoviruses are characterized by a double-stranded RNA (dsRNA) genome and an icosahedral shape. (A-III)
2. Rice Tungro Bacilliform Virus (RTBV) (B): This is a unique plant virus. Unlike most plant viruses which are RNA-based, RTBV has an isometric/bacilliform double-stranded DNA (dsDNA) genome.
It is a pararetrovirus. (B-IV)
3. Wheat Mosaic Virus (C): Many mosaic viruses of wheat (like Soil-borne wheat mosaic) are rod-shaped and contain single-stranded RNA (ssRNA). (C-I)
4. Barley Yellow Mosaic Virus (D): This belongs to the Potyviridae family.
These viruses are typically filamentous (long, flexuous rods) and contain single-stranded RNA (ssRNA). (D-II)

Step 2: Final Answer:
Matching gives (A)-(III), (B)-(IV), (C)-(I), (D)-(II), which is Option (A).