This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Barrel shaped eggs is/are seen in - 
Select and explain. 
A. Hookworm, B. Pin worm, C. Roundworm, D. Whipworn
D: Whipworn
Answer: D: Whipworn 
Explanation: Ans. is 'd' i.e., Whipworm [Ref Rajesh karykae 1"/e p. 1661Eggs of Trichuris-trichura (whipworm) are barrel-shaped with mucous plug at each pole. Shell is yellow to brow (bile-stained) and plugs are colourless. They float in saturated solution of common salt. When freshly passed, they contain unsegmented ova and are not infective to man.