If l, m, n, rare in harmonic progression and $$l > m > n > r$$, then $$\frac{l+r}{m+n}$$ = 

A

$$\frac{r}{l}. \frac{m}{n}$$

B

$$\frac{l}{n}. \frac{r}{m}$$

C

$$\frac{l}{r}. \frac{n}{m}$$

D

$$\frac{l+n}{m+r}$$