The following is the ovum of a helminth. What is true about the helminth?

Ans: b. Both adult and larval stages are seen in humans(Ref: Paniker's 7/e p135, 6/e p156)The given image is the egg of Hymenolepis nano showing characteristic polar filaments, polar knobs, yolk granules and,6 hooklets (hexacanth) in the oncosphere (embryo).Both adult and larval stages of this species are seen in humans.It causes a transient infection in humans but does not resolve on its own and has to be treated.