Which one is correct matching ?

Options

A. Potato- Late blight - Fusarium udum
B. Citrus - Canker - Pseudomonas rubrilineans
C. Brinjal - Root Knot - Meloidogyne incognita
D. Pigeon pea- seed Gall- Phytophthara infestans.

Answer

To determine the correct matching of plant diseases and their causative agents, we will analyze each option step by step.

### Step 1: Analyze the first option - Potato and Late Blight
- The disease associated with potato is **Late Blight**.
- The causative agent of Late Blight in potatoes is **Phytophthora infestans**.
- The option states **Fusarium udum**, which is incorrect.

**Hint:** Remember that Late Blight is specifically caused by Phytophthora infestans.

### Step 2: Analyze the second option - Citrus and Canker
- The disease associated with citrus is **Citrus Canker**.
- The causative agent of Citrus Canker is **Xanthomonas citri**.
- The option states **Pseudomonas**, which is incorrect.

**Hint:** Citrus Canker is linked to Xanthomonas citri, not Pseudomonas.

### Step 3: Analyze the third option - Brinjal and Root Knot
- The disease associated with brinjal (or eggplant) is **Root Knot**.
- The causative agent of Root Knot disease is the nematode **Meloidogyne incognita**.
- The option correctly matches Root Knot with Meloidogyne incognita.

**Hint:** Root Knot disease is caused by nematodes, specifically Meloidogyne incognita.

### Step 4: Analyze the fourth option - Pigeon Pea and Seed Gall
- The disease associated with pigeon pea is **Seed Gall**.
- The causative agent of Seed Gall disease is **Fusarium udum**.
- The option incorrectly states **Phytophthora infestans**, which is not the correct causative agent for Seed Gall in pigeon pea.

**Hint:** Seed Gall in pigeon pea is caused by Fusarium udum.

### Conclusion
After analyzing all the options, the only correct matching is:
- **Brinjal (Eggplant) - Root Knot - Meloidogyne incognita**

Thus, the correct answer is **Option C**.