Acidic pH of muscles is due to?

Correct option is A. Lactic acidCorrect Option ASolution∙ The pH of the normal muscles are alkaline. But if there is any increase in the rate of lactate production it will result in the acidosis of the muscle pH.∙ The internal pH of the muscle fibers are relatively alkaline in nature. Acidic pH of muscle occur due to the accumulation of lactic acid under the condition of high energy demand and insufficient supply of oxygen.∙ During any intense exercise the muscles affected which in turn increases the pH value to 6.3-6.5 which is acidic in nature.∙ So, the correct option is A.