answer any two of them with the use of internet if needed only.

1 sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. what is produced during this process?
a. alcohol and lactic acid
b. alcohol and co2
c. lactic acid and co2
d. lactic acid only

2 in each of the following questions, a statement of assertion is given, and a corresponding statement of reason is given just below it. of the statements, given below, mark the correct answer as:
a. both assertion and reason are true, and reason is the correct explanation of assertion.
b. both assertion and reason are true, but reason is not the correct explanation of assertion.
c. assertion is true, but reason is false.
d. both assertion and reason are false.
assertion: large concave mirrors are used to concentrate sunlight to produce heat in solar cookers.
reason: concave mirror converges the light rays falling on it to a point.

3 in each of the following questions, a statement of assertion is given, and a corresponding statement of reason is given just below it. of the statements, given below, mark the correct answer as:
a. both assertion and reason are true, and reason is the correct explanation of assertion.
b. both assertion and reason are true, but reason is not the correct explanation of assertion.
c. assertion is true, but reason is false.
d. both assertion and reason are false.
assertion: for observing traffic at the back, the drivers mirror is convex mirror.
reason: a convex mirror has lesser field of view than a plane mirror.

4
state one reason why exercise is important for good health.