In the questions given below, there are four statements

Solution

After decoding the codes, we get, Statements: Circle @ Triangle means Only Circle is Triangle Rectangle > Circle means Only a few Rectangle is Circle Rectangle & Sphere means All Rectangle is Sphere Sphere # Square means No Sphere is Square Conclusions: I. Circle ? Square means Some Circle is not Square II. Rectangle + Circle means All Rectangle is Circle is a possibility III. Triangle < Square means Some Triangle is Square IV. Circle ? Sphere means Some Circle is not Sphere All Rectangle is Sphere (A) + No Sphere is Square (E) → No Rectangle is Square (E) → Conversion → No Square is Rectangle (E) + Only a few Rectangle is Circle (I) → Some Circle is not Square (O*).  Hence conclusion I follows. Only a few Rectangle is Circle (I) → Some Rectangle is Circle (I) and Some Rectangle is not Circle (O). Hence conclusion II does not follow. Only Circle is Triangle → All Triangle is Circle and Triangle cannot have positive relation with anyone. Hence conclusion III does not follow. Some Circle is not Sphere: Follows (As, only Circle is Triangle, so some Circle can never be anm other element). Hence conclusion IV follows.