જો $\frac{1}{2 \times 4} + \frac{1}{4 \times 6} + \frac{1}{6 \times 8} + \dots (n \text{ પદો}) = \frac{k n}{n+1}$ હોય,તો $k$ ની કિંમત શોધો.

  • A
    $\frac{1}{4}$
  • B
    $\frac{1}{2}$
  • C
    $1$
  • D
    $\frac{1}{8}$

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