The conductivity of 0.2M methanoic acid is `8Sm^(-1)`. Then, degree of dissociation for methanoic acid is: [Given : `lambda_((H^(+)))^(@)=350 Scm^(2)"mol"^(-1),lambda_(HCOO^(-))^(@)=50 Scm^(2) "mol"^(-1)`]
A. `10^(-1)`
B. `10^(-3)`
C. `10^(-5)`
D. `10^(-7)`