Accumulation of lactic acid $(HC_3H_5O_3),$ a monobasic acid in tissues,leads to pain and a feeling of fatigue. In a $0.10 \ M$ aqueous solution,lactic acid is $3.7 \%$ dissociated. The value of the dissociation constant,$K_a,$ for this acid will be:
- A$1.4 \times 10^{-5}$
- B$1.4 \times 10^{-4}$
- C$3.7 \times 10^{-4}$
- D$2.8 \times 10^{-4}$
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