Identify the first reaction

The compound $C_{12}H_{22}O_{11}$ is sucrose.

The reaction is: $C_{12}H_{22}O_{11} + H_2O \xrightarrow{\text{Enzyme A}} C_6H_{12}O_6(\text{glucose}) + C_6H_{12}O_6(\text{fructose})$

This is the hydrolysis of sucrose into glucose and fructose.

The enzyme responsible for this is invertase (also called sucrase).

So, $\text{Enzyme A} = \text{Invertase}$

Identify the second reaction

The reaction shown is: $C_6H_{12}O_6 \xrightarrow{\text{Enzyme B}} 2C_2H_5OH + 2CO_2$

This is the fermentation of glucose to ethanol and carbon dioxide.

The enzyme complex responsible for alcoholic fermentation is zymase.

So, $\text{Enzyme B} = \text{Zymase}$

Match with the options

• A: Zymase and Invertase $\to$ incorrect
• B: Invertase and Amylase $\to$ incorrect
• C: Amylase and Invertase $\to$ incorrect
• D: Invertase and Zymase $\to$ correct

Final answer

$\boxed{\text{D: Invertase and Zymase}}$