An \[\alpha \] particle passes rapidly through the exact center of a hydrogen molecule, moving on a line perpendicular to the inter nuclear axis. The distance between the nuclei is b. Where on its path does the \[\alpha \] particle experience the greatest force? (Assume that the nuclei do not move much during the passage of the \[\alpha \] particle. Also neglect the electric field of the electrons in the molecule.)

• A.  \[\frac{b}{2}\] 
• B.                     \[\frac{b}{2\sqrt{2}}\]
• C.  \[\frac{b}{\sqrt{2}}\]                
• D.         None of these