Mark the correct alternative in each of the following: The sum to \( n \) terms of the series \(...

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Mark the correct alternative in each of the following:
The sum to \( n \) terms of the series \( \frac{1}{\sqrt{1}+\sqrt{3}}+\frac{1}{\sqrt{3}+\sqrt{5}}+\frac{1}{\sqrt{5}+\sqrt{7}}+\ldots \ldots . . \) is
(A) \( \sqrt{2 n+1} \)
(B) \( \frac{1}{2} \sqrt{2 n+1} \)
(C) \( \sqrt{2 n+1}-1 \)
(D) \( \frac{1}{2}\{\sqrt{2 n+1}-1\} \)
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