question_answer

When simplified, the product \[\left( 1-\,\,\frac{1}{2} \right)\left( 1-\,\,\frac{1}{3} \right)\left( 1-\,\,\frac{1}{4} \right)......\left( 1-\,\,\frac{1}{n} \right)\] gives

A)  \[\frac{1}{n}\] 

B)  \[\frac{2}{n}\]

C)  \[\frac{2\,(n-1)}{n}\]                 

D)  \[\frac{2}{n\,(n+1)}\]

E)         None of these