Group displacement law states that the emission of \[\alpha \] or \[\beta \] particles results in the daughter element occupying a position, in the periodic table, either to the left or right of that of the parent element. Which one of the following alternatives gives the correct position of the daughter element

• A.  On emission of \[\alpha \] particles -2 groups to the right On emission of \[\beta \] particles-1 group to the right
• B.  On emission of \[\alpha \] particles -2 groups to the right  On emission of \[\beta \] particles-1 group to the left
• C.  On emission of \[\alpha \] particles -    2 groups to the left         On emission of \[\beta \] particles-1 group to the left
• D.  On emission of \[\alpha \] particles -2 groups to the left    On emission of \[\beta \] particles-1 group to the right