If the system of equation $2x + 3y =\, -1; 3x + y = 2; \lambda x + 2y = \mu $ is consistent, then
If the system of equation $2x + 3y =\, -1; 3x + y = 2; \lambda x + 2y = \mu $ is consistent, then
- A
$\lambda - \mu = 2$
- B
$\lambda + \mu = -1$
- C
$\lambda + \mu = 3$
- D
$\lambda - \mu + 8= 0$
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