Task: Question Answering
Input (English): Problem: krishan and nandan jointly started a business . krishan invested 4 times as nandan did and invested his money for trible time as compared to nandan . if the gain is proportional to the money invested and the time for which the money is invested and the total gain was rs . 26000 , find the nandan ' s earning . 
Options: a ) 4000 , b ) 1000 , c ) 5000 , d ) 3000 , e ) 2000
Output (English): e