$N_{2(g)} + 3H_{2(g)} \rightleftharpoons 2NH_{3(g)}; K_1$
$NH_{3(g)} \rightleftharpoons \frac{1}{2} N_{2(g)} + \frac{3}{2} H_{2(g)}; K_2$
$\frac{1}{2} N_{2(g)} + \frac{3}{2} H_{2(g)} \rightleftharpoons NH_{3(g)}; K_3$
$2NH_{3(g)} \rightleftharpoons N_{2(g)} + 3H_{2(g)}; K_4$
જો $K_1 = K_2^x = K_3^y = K_4^z$ હોય,તો $x, y$ અને $z$ ના સાચા મૂલ્યો અનુક્રમે કયા છે?

• A
  $-2, 2, -1$
• B
  $-1, 2, -2$
• C
  $-2, 2, 1$
• D
  $2, 1, -2$