Task: Question Answering
Input (English): Problem: square x is inscribed in circle y . if the perimeter of x is 64 , what is the circumference of y ? 
Options: ['a ) 16 √ 2 π', 'b ) 8 √ 2 π', 'c ) 22 √ 2 π', 'd ) 12 √ 2 π', 'e ) 9']
Output (English): a