The correct answer is A, have polar filaments extending between the oncosphere and the outer shell.  Eggs of H. nana are oval or sub-spherical being approximately 40 to 60 µm wide by 30 to 50 µm long.  They are colorless (almost transparent) when visualized in wet preparations.  They are embryonated when passed in stools and possess a 6-hooked oncosphere inside the shell.

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