A student was asked to find the value of \[\frac{3}{7}\] of a sum of money. The student made a mistake by dividing the sum by \[\frac{3}{7}\]and then got an answer which exceeded the correct answer by Rs. 80. The correct answer for \[\frac{3}{7}\] of sum of money is:-

• A.  Rs. 42                         
• B.  Rs. 24          
• C.  Rs. 81             
• D.  Rs. 18