Task: Question Answering
Input (English): Question: The presence of digestive tract with branched caeca extending to the posterior end of the adult worm is characteristic of the species: 
 Options:  <1> Hepatic fasciola. <2> Fasciolopsis buski. <3> Dicrocoelium dentriticum. <4> Paragonimus westermani. <5> Clonorchis sinensis.
Output (English): 1