Find out the correct sentence.
Hybridisation means crossing between genetically dissimilar plants
Cross between two varieties is called as inter specific hybridisation
Introducing genes of desired character into a plant gives genetically modified crop
cross between plants of two species is called as inter varietal hybridisation

Options

A. (i) and (iii)
B. (ii) and (iv)
C. (ii) and (iii)
D. (iii) and (iv)

Explanation

To find the correct sentence among the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- **Statement:** "Hybridisation means crossing between genetically dissimilar plants."
- **Analysis:** Hybridisation indeed refers to the process of crossing between genetically dissimilar plants to produce a hybrid. This statement is **correct**.

2. **Analyze the Second Statement:**
- **Statement:** "Cross between two varieties is called as interspecific hybridisation."
- **Analysis:** Interspecific hybridisation refers to the crossing between different species, not just varieties. The cross between two varieties is known as intervarietal hybridisation. Thus, this statement is **incorrect**.

3. **Analyze the Third Statement:**
- **Statement:** "Introducing genes of desired character into a plant gives genetically modified crop."
- **Analysis:** This statement is true. Genetically modified crops are created by introducing specific genes that confer desired traits into the plant's genome. Therefore, this statement is **correct**.

4. **Analyze the Fourth Statement:**
- **Statement:** "Cross between plants of two species is called as inter-varietal hybridisation."
- **Analysis:** This statement is incorrect. The cross between plants of two different species is referred to as interspecific hybridisation, while intervarietal hybridisation refers to the crossing of different varieties within the same species. Thus, this statement is **incorrect**.

### Conclusion:
After analyzing all the statements, we find that the **first** and **third** statements are correct. Therefore, the correct answer is:

**Correct Sentences:**
1. Hybridisation means crossing between genetically dissimilar plants.
2. Introducing genes of desired character into a plant gives genetically modified crop.