Task: Question Answering
Input (English): Problem: a solid metallic spherical ball of diameter 6 cm is melted and recast into a cone with diameter of the base as 12 cm. the height of the cone is :
Options: ['a. 8 cm', 'b. 6 cm', 'c. 4 cm', 'd. 3 cm', 'e. none']
Output (English): d