The common roundworm infecting human beings is

The common roundworm infecting human beings is _______
A. Ascaris lumbricoides
B. Taenia solium
C. Fasciola hepatica
D. Enterobius histolytica

Correct answer is A. Ascaris lumbricoides

The common roundworm infecting human beings is Ascaris lumbricoides. The parasite is monogenetic which means that only one host is required for its development. Life span is nine to twelve months. It is common in children than in adults.