The buckling load will be maximum for a column, if
A. One end of the column is clamped and the other end is free
B. Both ends of the column are clamped
C. Both ends of the column are hinged
D. One end of the column is hinged and the other end is free
Answer: Option B

Answer is C
how is it explain
According to Euler's formula : ( C.π^2.EI)/L^2.
Buckling is directly proportional to the C (fixity constant).
Value of C:
1 for both end is hinged.
4 for both end is fixed(clamped).
2 for one end fixed another is hinged.
.25 for one end fixed another is free.