Which of the following Bt crops is being grown in India by the farmers ?

Options

A. Brinjal
B. Soybean
C. Maize
D. Cotton

Answer

### Step-by-Step Solution:

1. **Understanding Bt Crops**: The term "Bt" stands for Bacillus thuringiensis, a bacterium that produces proteins toxic to certain pests. These proteins are used in genetically modified crops to provide resistance against pests.

2. **Identifying the Bt Crop Grown in India**: Among the various Bt crops, the question asks for the one that is currently being cultivated by farmers in India.

3. **Focusing on Bt Cotton**: The most prominent Bt crop grown in India is Bt cotton. It has been widely adopted by farmers due to its pest resistance, particularly against cotton bollworms.

4. **Resistance Mechanism**: Bt cotton is engineered to express a toxin that is initially in an inactive form (protoxin). When pests consume the cotton, the alkaline conditions in their gut activate this protoxin into a toxic form, which damages the gut wall, leading to the death of the pest.

5. **Conclusion**: Based on the information, the correct answer to the question is **Bt Cotton**.