Task: Question Answering
Input (English): Problem: what is the area of an equilateral triangle whose one side length is 90 ? 
Options: ['a ) 4025 √ 3', 'b ) 3525 √ 3', 'c ) 3025 √ 3', 'd ) 2525 √ 3', 'e ) 2025 √ 3']
Output (English): e