The correct option is C. Roundworm belongs to the kingdom animalia and to the phylum nematoda. It has round, unsegmented, smooth and thin body which can grow to the maximum of four feet in length. It has a bilateral symmetry. A roundworm has no skeleton and it reproduces sexually.
Which region of the hip bone articulates with the sacrum? Ilium. The ilium is the largest region of this bone. It articulates with the sacrum at the articular surface.
