Buckling loads (Pi) of 4 columns of equal length and cross section, but with different end conditions are shown below. Which ofthe following is TRUE?

A

$$p_1 < p_2 < p_3 < p_4$$

B

$$p_3 < p_1 < p_4 < p_2$$

C

$$p_1 < p_4 < p_2 < p_3$$

D

$$p_3 < p_4 < p_1 < p_2$$