question_answer

The sets\[{{S}_{1}},{{S}_{2}},{{S}_{3}},....\]are given by \[{{S}_{1}}=\left\{ \frac{2}{1} \right\},\] \[{{S}_{2}}=\left\{ \frac{3}{2},\frac{5}{2} \right\},{{S}_{3}}=\left\{ \frac{4}{3},\frac{7}{3},\frac{10}{3} \right\},\] \[{{S}_{4}}=\left\{ \frac{5}{4},\frac{9}{4},\frac{13}{4},\frac{17}{4} \right\},....\] Then the sum of the numbers in the set\[{{S}_{25}}\]is

A)  320                                       

B)  322

C)  324                       

D)         325

E)  326