<prompt> A 7 year old presented with intermittent abdominal cramps, loose stool and on stool examination eggs of size 100 m are seen, which is not the cause ?Fasciola giganticaEchinostoma iliocanumGastrodiscoides hominisOpisthorcis viverni  <response>: Ans. is. d i.e., Opisthorcis viverni Eggs of Opisthorcis viverni have size very much less than 100 m 