Task: Question Answering
Input (English): Problem: the spherical ball of lead 3 cm in diameter is melted and recast into 3 spherical balls. the diameters of two of these are 1 1 / 2 cm and 2 cm respectively. the diameter of third ball is ?
Options: a. 2.8, b. 2.5, c. 2.2, d. 2.0, e. 2.1
Output (English): b