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: the radius of a sphere is increased by 50 % . the increase in surface area of the sphere is : 
Options: a ) 168 , b ) 125 , c ) 186 , d ) 197 , e ) 191
[A]: b


[Q]: Problem: a cubical block of metal weighs 3 pounds . how much will another cube of the same metal weigh if its sides are twice as long ? 
Options: a ) 48 , b ) 32 , c ) 24 , d ) 18 , e ) 12
[A]: c


[Q]: Problem: difference between the length & breadth of a rectangle is 10 m . if its perimeter is 206 m , then its area is ? 
Options: ['a ) 2400 m ^ 2', 'b ) 1500 m ^ 2', 'c ) 2520 m ^ 2', 'd ) 1200 m ^ 2', 'e ) 2580 m ^ 2']
[A]:
d