The muscle cell fluid of an athlete was tested immediately after a 100m race and was found to
contain a high concentration of lactic acid .Explain what could have caused this.

(A) athlete must have eaten food containing a lactic acid
(B) athlete must have injected lactic acid into his blood just before the race
(C) athlete must have carried out anaerobic respiration during the race
(D) athlete must have inhaled lactic acid from the environment during the race.

Ans:

(C) athlete must have carried out anaerobic respiration during the race