All transistor in the N output current mirror in figure given below are matched with a finite gain $$\beta$$ and early voltage $$V_{A} = \infty$$ . The expression for load current is

A

$$\frac{I_{ref}}{\left(1 + \frac{(1 + N)}{\beta(\beta+1)}\right)}$$

B

$$\frac{I_{ref}}{\left(1 + \frac{N}{\beta(\beta+1)}\right)}$$

C

$$\frac{\beta I_{ref}}{\left(1 + \frac{(1 + N)}{\beta(\beta+1)}\right)}$$

D

$$\frac{\beta I_{ref}}{\left(1 + \frac{N}{\beta(\beta+1)}\right)}$$