For a four variable K-Map, if each cell is assigned one integer value in range 0-15 then which is the cells adjacent to the cell corresponding to decimal value 7?

For a four variable K-Map, if each cell is assigned one integer value

1.	For a four variable K-Map, if each cell is assigned one integer value in range 0-15 then which is the cells adjacent to the cell corresponding to decimal value 7?
A.	3, 5, 6 and 8
B.	3, 5, 10 and 11
C.	3, 5, 6 and 15
D.	4, 6, 8 and 15
Answer» D. 4, 6, 8 and 15