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 ratio of radius of a circle and the side of a square is 2 : 13 . find the ratio of their areas : 
Options: ['a ) 2 : 1', 'b ) 4 : 7', 'c ) 8 : 77', 'd ) 4 : 169', 'e ) none']

A: d
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Q: Problem: what should be added to 4329 so that it may become a perfect square ? 
Options: a ) 24 , b ) 25 , c ) 26 , d ) 27 , e ) 28

A: d
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Q: Problem: if the volume of two cubes are in the ratio 8 : 1 , the ratio of their edges is : 
Options: ['a ) 2 : 1', 'b ) 3 : 2', 'c ) 3 : 5', 'd ) 3 : 7', 'e ) none of these']

A:
a
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