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If A=1/(1xx2)+1/(1xx4)+1/(2xx3)+1/(4xx7)...

If A=`1/(1xx2)+1/(1xx4)+1/(2xx3)+1/(4xx7)+ 1/(3xx4)+1/(7xx10)`...... upto 20 terms, then what is the value of A?
यदि`1/(1xx2)+1/(1xx4)+1/(2xx3)+1/(4xx7)+ 1/(3xx4)+1/(7xx10).....20` पदों तक हो, तो A का मान क्या है?

A

A)379/308

B

B)171/140

C

C)379/310

D

D)420/341

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