The compounds A, B and C in the reaction sequence
`A overset("diastase")to B overset("maltase")to C overset("zymase")to C_(2)H_(5)OH+CO_(2)` are :

Options

A. Starch, sucrose, fructose
B. Starch , sucrose, glucsoe
C. Starch, maltose, glucose
D. Starch , surcose, maltose

Answer

To solve the problem, we need to identify the compounds A, B, and C in the given reaction sequence. Let's break it down step by step:

### Step 1: Identify Compound C
The final product of the reaction sequence is given as \( C_2H_5OH \) (ethyl alcohol) and \( CO_2 \). The enzyme responsible for this conversion is zymase, which is known to convert glucose into ethanol and carbon dioxide through fermentation.

- **Conclusion**: Compound C is glucose (\( C_6H_{12}O_6 \)).

### Step 2: Identify Compound B
Next, we need to find out what compound B is. The reaction shows that B is converted into C (glucose) in the presence of the enzyme maltase. Maltase is known to hydrolyze maltose (a disaccharide) into two glucose molecules.

- **Conclusion**: Compound B is maltose (\( C_{12}H_{22}O_{11} \)).

### Step 3: Identify Compound A
Finally, we need to determine what compound A is. The reaction indicates that A is converted into B (maltose) in the presence of the enzyme diastase. Diastase catalyzes the breakdown of starch (a polysaccharide) into maltose.

- **Conclusion**: Compound A is starch.

### Summary of Compounds
- **A**: Starch
- **B**: Maltose
- **C**: Glucose

Thus, the correct sequence of compounds A, B, and C is:
- A: Starch
- B: Maltose
- C: Glucose

### Final Answer
The compounds A, B, and C in the reaction sequence are:
- A: Starch
- B: Maltose
- C: Glucose

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