bro from this thing I am getting A , C and B to be wrong. Also can u tell how to decide whether the groups present intially would be in same plane or different plane ?? Like in our question if there is anti addition if I arrange och3 to be above the plane and br to be intp the plane , what will be the result with That chiral group with H with D? How to decide which one will be into the plane in och3 one and above in br one ?