In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[Q]: Problem: how many 4 x 5 x 8 cubes could fit in a 10 x 16 x 84 box ? 
Options: a ) 84 , b ) 90 , c ) 85 , d ) 77 , e ) 64
[A]: a


[Q]: Problem: sides of a triangle are 13 cm . 14 cm . and 15 cm . respectively . calculate the area of triangle . 
Options: ['a ) 80', 'b ) 82', 'c ) 84', 'd ) 86', 'e ) 88']
[A]: c


[Q]: Problem: the volume of the largest right circular cone that can be cut out of a cube of edge 7 cm is : 
Options: ['a ) 89.8 cm ³', 'b ) 92.5 cm ³', 'c ) 132.8 cm ³', 'd ) 144.5 cm ³', 'e ) none']
[A]:
a