$$\left(1 + \frac{1}{2}\right)\left(1 + \frac{1}{3}\right)\left(1 + \frac{1}{4}\right) + ....... \left(1 + \frac{1}{41}\right) =$$

A

41

B

$$\frac{1}{21}$$

C

$$\frac{1}{41}$$

D

21