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'.

Q: Problem: find the principle on a certain sum of money at 5 % per annum for 4 years if the amount being rs . 1120 ? 
Options: a ) 933 , b ) 1067 , c ) 1977 , d ) 1056 , e ) 1097

A: a
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Q: Problem: calculate how many seconds it will take for 4 bells to toll together again , given that they begin to toll together respectively at the intervals of 9 , 10 , 14 and 18 seconds . ? 
Options: a ) 636 , b ) 631 , c ) 633 , d ) 610 , e ) 630

A: e
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Q: Problem: harkamal purchased 8 kg of grapes at the rate of 70 per kg and 9 kg of mangoes at the rate of 75 per kg . how much amount did he pay to the shopkeeper ? 
Options: a ) a ) 1235 , b ) b ) 1055 , c ) c ) 1065 , d ) d ) 1075 , e ) e ) 1080

A:
a
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