Read the given passage and select the correct option for X and Y.
Microorganisms are used for the large scale production of alcohol, wine and acetic acid. X is used for commercial production of alcohol and wine. The process of conversion of sugar into alcohol is known as Y.

Options

A. X: Streptococcus, Y: Aerobic respiration
B. X: Saccharomyces, Y: Fermentation
C. X: Lactobacillus, Y : Fermentation
D. X: Saccharomyces, Y: Aerobic respiration

Answer

To solve the question, we need to identify the correct terms for X and Y based on the information provided in the passage.

### Step-by-Step Solution:

1. **Identify the context**: The passage discusses the use of microorganisms in the production of alcohol, wine, and acetic acid.

2. **Determine what X represents**: The passage states that "X is used for commercial production of alcohol and wine."
- In the context of alcohol and wine production, the microorganism commonly used is yeast, specifically the species *Saccharomyces cerevisiae*.

3. **Determine what Y represents**: The passage mentions that "the process of conversion of sugar into alcohol is known as Y."
- This process is a well-known fermentation process, where yeast converts sugars into alcohol and carbon dioxide.

4. **Select the correct options**:
- For X, the correct answer is *Saccharomyces* (the yeast used in fermentation).
- For Y, the correct answer is fermentation (the process of converting sugar into alcohol).

5. **Final Answer**:
- X = *Saccharomyces*
- Y = Fermentation