Toughness index is defined as the ratio of
(A) Plasticity index to consistency index
(B) Plasticity index to flow index
(C) Liquidity index to flow index
(D) Consistency index to liquidity index
(A) Plasticity index to consistency index
(B) Plasticity index to flow index
(C) Liquidity index to flow index
(D) Consistency index to liquidity index