Man - snail - crab man cycle is seen in: (A) Paragonimus westermanii, (B) Fasciola hepatica, (C) Schistosoma mansoni, (D) Echinococcus granulosus
Answer is A. ParasiteFirst intermediate hostSecond intermediate hostParagonimus westermaniFresh water snail Crab/ Cray fishDiphyllobothrium latumCopepods (Cyclops)Fresh water fish Clonorchis sinensisSnail Fresh water fish Fasciola hepaticaSnail Aquatic vegetation Fasciolopsis buskiSnail Aquatic vegetation (Ref: K.D Chatterjee 13th edition, p196-198)