451 . $\frac{1}{2},\frac{2}{3},\frac{3}{4}$ ------অনুক্রমটির সাধারণ পদ কোনটি? ..

• A. $\frac{n-1}{n+1}$
• B. $\frac{2n}{n+1}$
• C. $\frac{1}{n}$
• D. $\frac{n}{n+1}$

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Answer: Option D

Explanation: