Given
`N_(2)(g)+3H_(2)(g)hArr2NH_(3)(g),K_(1)`
`N_(2)(g)+O_(2)(g)hArr2NO(g),K_(2)`
`H_(2)(g)+(1)/(2)O_(2)hArrH_(2)O(g),K_(3)`
The equilibrium constant for
`2NH_(3)(g)+(5)/(2)O_(2)(g)hArr2NO(g)+3H_(2)O(g)`
will be
A. `K_(1)K_(2)K_(3)`
B. `(K_(1)K_(2))/(K_(3))`
C. `(K_(1)K_(3)^(2))/(K_(2))`
D. `(K_(1)K_(3)^(2))/(K_(3))`
