In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Problem: the calendar of the year 2028 can be used again in the year ? 
Options: a ) 2041 , b ) 1951 , c ) 2056 , d ) 1971 , e ) 1973
c

Problem: find the simple interest on rs . 350 for 10 months at 5 paisa per month ? 
Options: a ) 277 , b ) 175 , c ) 288 , d ) 266 , e ) 121
b

Problem: what quantity of water should be added to reduce 9 liters of 50 % acidic liquid to 30 % acidic liquid ? 
Options: a ) 6 liters , b ) 8 liters , c ) 10 liters , d ) 12 liters , e ) 15 liters

a