Match the following and choose the correct option from those given below.

Options :

Yeast cells are able to regenerate ${\mathrm{NAD}}^{+}$ regenerated from NADH during the :
1. reduction of acetaldehyde to ethyl alcohol
2. oxidation of pyruvate to acetyl CoA
3. reduction of pyruvate to form lactate
4. oxidation of NAD⁺ in the citric acid cycle

In lactate fermentation, the final electron acceptor is:

The enzyme lactate dehydrogenase catalyses:

1. the oxidation of pyruvate to lactate to regenerate NAD⁺.
2. the reduction of pyruvate to lactate to regenerate NAD⁺.
3. the reduction of pyruvate to lactate to regenerate NADH.
4. the oxidation of pyruvate to lactate to regenerate NADH.