$A$ rod of weight $w$ is supported by two parallel knife edges $A$ and $B$ and is in equilibrium in a horizontal position. The knives are at a distance $d$ from each other. The centre of mass of the rod is at a distance $x$ from $A$.

• A
  The normal reaction at $A$ is $\frac{w(d-x)}{d}$.
• B
  The normal reaction at $B$ is $\frac{wx}{d}$.
• C
  The normal reaction at $A$ is $\frac{wx}{d}$.
• D
  Both $(A)$ and $(B)$ are correct.