White performed successful tissue culture in

Options

A. 1939
B. 1932
C. 1929
D. 1922

Answer

To solve the question regarding when White performed successful tissue culture, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Tissue Culture**: Tissue culture is a technique used in biology to grow cells, tissues, or organs in a controlled environment, typically on a nutrient medium.

2. **Identifying the Key Figure**: The question mentions "White," who is known for his contributions to tissue culture.

3. **Historical Context**: We need to determine the year in which White successfully performed tissue culture. The options provided are 1939, 1932, 1929, and 1922.

4. **Researching White's Contribution**: According to historical records, White successfully attempted tissue culture in 1932. He was the first to culture tomato roots and developed a nutrient medium that included essential vitamins.

5. **Understanding the Experiment**: In his experiment, White was able to create a continuously growing callus from the roots, demonstrating the property of totipotency, which is the ability of a single cell to develop into a complete organism.

6. **Conclusion**: Based on the information gathered, the correct answer to the question is **B - 1932**.

### Final Answer:
**B - 1932**

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