Task: Question Answering
Input (English): Problem: the curved surface of a right circular cone of height 15 cm and base diameter 16 cm is 
Options: ['a ) 40 ∏ cm ³', 'b ) 60 ∏ cm ³', 'c ) 136 ∏ cm ³', 'd ) 138 ∏ cm ³', 'e ) none']
Output (English): c