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If \( a_{T}0, r \in N \) and \( a_{1}, a_{2}, a_{3}, \ldots . a_{2 n} \) are in A.P., then
\[
\frac{a_{1}+a_{2 n}}{\sqrt{a_{1}}+\sqrt{a_{2}}}+\frac{a_{2}+a_{2 n-1}}{\sqrt{a_{2}}+\sqrt{a_{3}}}+\frac{a_{3}+a_{2 n-2}}{\sqrt{a_{3}}+\sqrt{a_{4}}}+\ldots .+\frac{a_{n}+a_{n+1}}{\sqrt{a_{n}}+\sqrt{a_{n+1}}}
\]
is equal to
(A) \( n-1 \)
(B) \( \frac{n\left(a_{1}+a_{2 n}\right)}{\sqrt{a_{1}}+\sqrt{a_{n+1}}} \)
(C) \( \frac{n-1}{\sqrt{a_{1}}+\sqrt{a_{n+1}}} \)
(D) none of these
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