If you observe the two graphs, the graph of G(x) is shifted vertically up by 1 unit as compared to F(x).
So the relation between two graphs can be written as:
G(x) = F(x) + 1
Using the value of F(x), we get:
G(x) = 3 - x⁴ + 1
So,
G(x) = 4 - x⁴
Thus, option A gives the correct answer.