A : Yeast in involved in alcoholic fermentation.

 R : Yeast poison themselves to death when concentration of alcohol reaches about 13%.

In the follewing questions, a statement of assertion (A) is followed by a statement of reason (R)

1. If both Assertion & reason are true and the reason in the correct explanation of the assertion, then mark (1).

2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

3.  If Assertion is ture statement but Reason is false, then mark (3).

4.  If both Assertion and reason are false statments, then mark (4).

In the figure given below the correct match is: 

1. A-Ethanol, B-Lactic acid, C-Dihydroxyacetone phosphate

2. A-Lactic acid, B-Ethanol, C-Oxaloacetic acid

3. A-Lactic acid, B-Ethanol, C-3-Phosphoglyceric acid

4. A-Ethanol, B-Lactic acid, C-3-phosphoglyceric acid

Consider the statements a, b, c and d  with respect to fermentation by yeast and select the correct choice

a. Production of $C{O}_2$ and ethanol

b. Complete oxidation of glucose 

c. The reducing agent is NADH + $H^{+}$

d. It is achieved under anaerobic condition 

1. a & b are incorrect

2. b is incorrect

3. a & c is incorrect

4. all are incorrect 

Consider the following statements about fermentation 

a. Yeast produces $C{O}_2$ and ethanol by incomplete oxidation of glucose.

b. Some bacteria produce lactic acid from pyruvic acid.

c. In both lactic acid and alcohol fermentation, a lot of energy is released.

d. H₂O is not released.

The correct statements are 

1. Only a & d 

2. a, b & d 

3. b & d 

4. a, c & d