Salt tolerant transgenic has been developed for

Options

A. Brinjal
B. Potato
C. Tomato
D. Grape

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks about the development of salt-tolerant transgenic plants. We need to identify which crop has been genetically engineered to tolerate salt.

2. **Identifying the Crops Listed**: The options provided are brinjal, potato, tomato, and grape. We need to analyze which of these crops has been specifically mentioned in relation to salt tolerance.

3. **Researching Salt Tolerance in Crops**: According to the information provided, plant biologists from the University of California and the University of Toronto developed a genetically engineered tomato plant that can thrive in salty irrigation water.

4. **Recognizing the First Salt-Tolerant Crop**: The transcript mentions that the tomato was the first truly salt-tolerant crop. This indicates that among the options, tomato is the one that has been successfully modified for salt tolerance.

5. **Conclusion**: Based on the information gathered, the correct answer to the question is that salt-tolerant transgenic has been developed for **tomato**.

### Final Answer
The correct answer is **tomato**.