The greatest ecentricity which a load can have without producing tension in a short hollow circular column producing of outside diameter ‘D’ and inside diameter ‘d’ is:

A

$$\frac{D^2 - d^2}{8D}$$

B

$$\frac{D^2 + d^2}{8D}$$

C

$$\frac{D^2 + d^2}{4D}$$

D

$$\frac{D^2 - d^2}{4D}$$