Correct option is: C) 4 : 3
Surface area of sphere = \(4 \pi r^2\)
Surface area of hemisphere = \(3\pi r^2\)
\(\therefore\) \(\frac {Surface \, area \, of\, sphere}{surface \, area \, of \, hemisphere}\) = \(\frac {4 \pi r^2}{3 \pi r^2} = \frac 43 = 4: 3\)
Hence, the ratio between the surface area of sphere and hemisphere is 4 : 3.