Task: Question Answering
Input (English): Problem: the diagonal of a square is 4 ? 2 cm . what will be the diameter of another square if their area is double that of the first square ? 
Options: ['a ) 8 cm', 'b ) 9 cm', 'c ) 10 cm', 'd ) 11 cm', 'e ) 12 cm']
Output (English): a