Assertion (A): A long column of square cross – section has greater buckling stability than that of a column of circular cross – section of same length same material same end conditions and same area of cross – section
Reason (R): The second moment of area of a column of circular cross – section is smaller than that of a column of square cross – section having the same area
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true