Task: Question Answering
Input (English): Problem: there were 35 students in a hostel . due to the admission of 7 new students , the expenses of mess were increased by 42 per day while the average expenditure per head diminished by 1 . what was the original expenditure of the mess ? 
Options: a ) 400 , b ) 400 , c ) 445 , d ) 465 , e ) none of the above
Output (English): b