Statement: All chairs are tables. All tables are desks. Some desks are benches. Some desks are sofas. Conclusions: I. Some benches are sofas. II. Some sofas are tables. III. Some benches are tables. Iv. No chair is bench

Some desks are benches → (I) conversion → Some benches are desks (I) + Some desks are sofas = I + I = No conclusion Hence I does not follow. All tables are desks + Some desks are sofas = A + I = No conclusion Hence II does not follow. All tables are desks + Some desks are benches + A + I = No conclusion Hence III does not follow. For the same reason IV too does not follow.