Which of these processes involve tissue culture ?
I. Somatic hybrization to produce a hybrid between potato and tomato called potato .
II. Mutation breeding to produce a mung bean resistant to yellow mosaic disease .
III . Cross hybridization to produce insect - resistant rapeseed mustard called Pusa Gaurav.
IV. Micropropagation to produce a virus - free potato plant.

Options

A. I and III
B. I , II and IV
C. III and IV
D. I and IV

Answer

To solve the question regarding which processes involve tissue culture, we will analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I:** Somatic hybridization to produce a hybrid between potato and tomato called pometo.

- **Explanation:** Somatic hybridization is a process that involves the fusion of protoplasts (cells without cell walls) from two different plant species. This process is indeed a part of tissue culture techniques. Therefore, this statement is related to tissue culture.

### Step 2: Analyze Statement II
**Statement II:** Mutation breeding to produce a mung bean resistant to yellow mosaic disease.

- **Explanation:** Mutation breeding involves inducing mutations in the DNA of plants to create new varieties. This process does not involve tissue culture techniques but rather traditional breeding methods. Thus, this statement is not related to tissue culture.

### Step 3: Analyze Statement III
**Statement III:** Cross hybridization to produce insect-resistant rapeseed mustard called Pusa Gaurav.

- **Explanation:** Cross hybridization is a method of breeding that involves the mating of two different plant varieties to produce hybrids. This is a traditional breeding method and does not involve tissue culture. Therefore, this statement is also not related to tissue culture.

### Step 4: Analyze Statement IV
**Statement IV:** Micropropagation to produce a virus-free potato plant.

- **Explanation:** Micropropagation is a tissue culture technique used to produce large numbers of identical plants from a small piece of plant tissue (ex-plant). It is commonly used to produce virus-free plants. Thus, this statement is related to tissue culture.

### Conclusion
Based on the analysis:
- **Statement I** (Somatic hybridization) and **Statement IV** (Micropropagation) are related to tissue culture.
- **Statements II** (Mutation breeding) and **III** (Cross hybridization) are not related to tissue culture.

Thus, the correct answer is **I and IV**.

### Final Answer
The processes that involve tissue culture are **I and IV**.

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