1) No Chair is a Desk (E) + [All Tables are Desks (A) → Conversion] → Some Desks are Tables (I) → Some Tables are not Chairs (O*). Hence conclusion I does not follow. No Chair is a Desk (E) + At least Some Desks are Sticks (I) → Some Sticks are not Chairs (O*) → Probable conclusion → Some Chairs may be Sticks (I). Hence conclusion II follows. Some Tables can be Chairs (I) + [Some Walls can be Chairs (I) → Conversion] → Some Chairs are Walls (I) → No conclusion. Hence conclusion III does not follow. Hence option 1 is not correct. 2) All Tables are Walls (A) + No Wall is a Chair (E) → No Table is a Chair (E). Hence conclusion I does not follow. Some Sticks are Chairs (I) → Probable conclusion → Some Chairs are Sticks (I). Hence conclusion II does not follow. No Wall is a Chair (E) → Probable conclusion → No conclusion. Hence conclusion III does not follow. Hence option 2 is not correct. 3) All Chairs are Desks (A) + Some Desks are Sticks (I) → Probable conclusion → Some Chairs are Sticks (I) + Some Sticks are Tables (I) → Probable conclusion → Some Tables can be Chairs (I). Hence conclusion I follows. All Chairs are Desks (A) + Some Desks are Sticks (I) → Probable conclusion → Some Chairs may be Sticks (I). Hence conclusion II follows. All Chairs are Desks (A) + Some Desks are Sticks (I) → Probable conclusion → Some Chairs are Sticks (I) + Some Sticks are Tables (I) → Probable conclusion → Some Chairs are Tables (I) + All Tables are Walls (A) → Probable conclusion → Some Walls can be Chairs (I). Hence conclusion III follows. Hence option 3 is correct. 4) Some Tables are Walls (I) + No Wall is a Chair (E) → Some Tables are not Chairs (O). Hence conclusion I does not follow. Some Sticks are Chairs (I) → Probable conclusion → → No conclusion. Hence conclusion II does not follow. No Wall is a Chair (E) → Probable conclusion → No conclusion. Hence conclusion III does not follow. Hence option 4 is not correct.
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