If $$\sqrt {\left( {x - 1} \right)\left( {y + 2} \right)}= 7,$$x and y being positive whole numbers, then the values of x and y respectively are ?

If $$\sqrt {\left( {x - 1} \right)\left( {y + 2} \right)}= 7,$$x and y

1.	If $$\sqrt {\left( {x - 1} \right)\left( {y + 2} \right)}= 7,$$x and y being positive whole numbers, then the values of x and y respectively are ?
A.	, 5
B.	5, 12
C.	2, 19
D.	one of these
Answer» B. 5, 12