Sheathed microfilaria is/are -: (A) W. Bancrofti, (B) Loa-loa, (C) M. Perstans, (D) B. Malayi
Answer is A. Covered by hyaline sheath The sheath is much longer than the embryo so that microfilaria can move forward and backward with in it . (refer pgno:165 baveja 3 rd edition)