Subject: mathqa
Question: the diameters of two spheres are in the ratio 1 : 2 what is the ratio of their surface area ?
Option: 
A: 1 : 1']
B: 1 : 6', 'd ) 1 : 2', 'e ) 1 : 1']
C: 1 : 2', 'e ) 1 : 1']
D: 1 : 4', 'c ) 1 : 6', 'd ) 1 : 2', 'e ) 1 : 1']
Answer: D