Statement: All belts are rollers. Some rollers are wheels. All wheels are mats. Some mats are cars. Conclusions: I. Some mats are rollers. II. Some mats are belts. III. Some cars are rollers. IV. Some rollers are belts.

Some rollers are wheels + All wheels are mats = I + A = I = Some rollers are mats → conversion → Some mats are rollers (I) Hence I follows. Some rollers are mats + Some mats are cars = I + I = No conclusion Hence III does not follow. All belts are rollers (A) → conversion → Some rollers are belts(I) Hence IV follows. All belts are rollers + Some rollers are mats = I + A = No conclusion Hence II does not follow.