A fluid having a density of 1 $$\frac{g}{cc}$$ is in a state with Grashof number $$2 \times 10^{6}$$ and prandtl number 0.7. Assuming acceleration due to gravity as 10 $$\frac{m}{s^{2}}$$, calculate the Rayleigh number?

A

$$1.4 \times 10^{6}$$

B

$$2.86 \times 10^{6}$$

C

$$3.7 \times 10^{6}$$

D

$$8.4 \times 10^{6}$$