Match the following
`{:(,"Disease",,"Pathogen"),(a,"Red rot of sugarcane",(i),"Virus"),(b,"Root - knot of tobacco",(ii),"Bacteria"),(c,"Black rot of crucifers",(iii),"Nematode"),(d,"Turnip mosaic",(iv),"Fungi"):}`

Options

A. a (i) , b(ii) , c(iii) , d(iv)
B. a(iii) , b(iv) , c(i) , d(ii)
C. a (iv) , b(iii) , c(ii) , d(i)
D. a (ii) , b(i) , c(iv) , d(iii)

Answer

To solve the matching question regarding diseases and their respective pathogens, we will analyze each disease and identify the correct pathogen associated with it.

### Step-by-Step Solution:

1. **Identify the Pathogen for Red Rot of Sugarcane**:
- **Disease**: Red rot of sugarcane
- **Pathogen**: This disease is caused by a fungus known as *Colletotrichum falcatum*.
- **Match**: Red rot of sugarcane (a) → Fungi (iv)

2. **Identify the Pathogen for Root Knot of Tobacco**:
- **Disease**: Root-knot of tobacco
- **Pathogen**: This disease is caused by a nematode called *Meloidogyne hapla*.
- **Match**: Root-knot of tobacco (b) → Nematode (iii)

3. **Identify the Pathogen for Black Rot of Crucifers**:
- **Disease**: Black rot of crucifers
- **Pathogen**: This disease is caused by a bacterium known as *Xanthomonas campestris*.
- **Match**: Black rot of crucifers (c) → Bacteria (ii)

4. **Identify the Pathogen for Turnip Mosaic**:
- **Disease**: Turnip mosaic
- **Pathogen**: This disease is caused by a virus.
- **Match**: Turnip mosaic (d) → Virus (i)

### Final Matches:
- (a) Red rot of sugarcane → (iv) Fungi
- (b) Root-knot of tobacco → (iii) Nematode
- (c) Black rot of crucifers → (ii) Bacteria
- (d) Turnip mosaic → (i) Virus

### Summary of Matches:
- A → IV
- B → III
- C → II
- D → I