In this question are given four statements followed by five conclusions, one of which definitely does not logically follow (or is not a possibility of occurrence) from the given statements. That conclusion is your answer. 

(Note: You have to take the four given statements to be true).

 STATEMENTS:


 =>All circles are spheres.


=>All spheres are rectangles. .

=>No rectangle is a pyramid.

=>No pyramid is a triangle.

CONCLUSIONS:

1) At least some circles are pyramids.

2) All triangles being circles is a possibility.

3) All rectangles being triangles is a possibility.

4) At least some rectangles are circles.

5) No pyramid is a sphere. .