Bt in popular Bt-Cotton/Brinjal stands for

Options

A. Biotechnology
B. Bacillus tomentosa
C. Bacillus thuringiensis
D. Best type

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks for the meaning of "Bt" in the context of Bt cotton and Bt brinjal.

2. **Identifying the Options:**
The options provided are:
- A) Biotechnology
- B) Bacillus tomentosa
- C) Bacillus thuringiensis
- D) Best type

3. **Analyzing the Options:**
- **A) Biotechnology:** While Bt cotton and brinjal are products of biotechnology, "Bt" specifically does not stand for biotechnology.
- **B) Bacillus tomentosa:** This is not the correct bacterium associated with Bt crops.
- **C) Bacillus thuringiensis:** This is a bacterium known for producing a toxin that is effective against certain pests, which is the correct answer.
- **D) Best type:** This option does not relate to the scientific naming of the crops.

4. **Conclusion:**
The correct answer is **C) Bacillus thuringiensis**. The "Bt" in Bt cotton and Bt brinjal refers to this bacterium, which is genetically modified into these plants to produce an insecticidal toxin.

5. **Explanation of the Mechanism:**
Bt cotton and Bt brinjal are transgenic plants that produce a toxin from Bacillus thuringiensis. This toxin affects pests like the cotton bollworm by binding to their gut wall, creating pores, and ultimately leading to their death when they consume the plant.