The ratio of difference in the number of electrons between K and M shells is `3 : 2` for X and Y elements respectively . 'X' possesses stable electronic configuration and M is the valence shell for both X and Y. The electronic configurations of X and Y are respectively.

Options

A. 2 , 8 , 5 and 2 , 8 , 4
B. 2 , 8 , 8 and 2 , 8 , 6
C. 2 , 8 , 8 and 2 , 6 , 6
D. 2 , 8 , 6 and 2 , 8 , 4

Answer

2

Explanation

`{:(X,:,Y),(2_(,)8_(,)8,,2_(,)8_(,)x),((8-2)/(x-2)=(3)/(2),,rArrx=6):}`
`:.Xto2,8,8and Yto2,8,6`