For the reaction `:2A (g) + B (g) hArr 3 C g) + D (g)`
Two moles each of A and B were taken into a flask: The following must always be true when the system attained equilibrium

Options

A. `[A]=[B]`
B. `[A] lt [B]`
C. `[B] = [C]`
D. `[A] gt [B]`

Answer

B