The two plots below give the following information about six firms $\text{A, B, C, D, E}$, and $\text{F}$ for $2019$ and $2023$.
PAT: The firm's profits after taxes in Rs. crores,
ES: The firm's employee strength, that is the number of employees in the firm, and
PRD: The percentage of the firm's PAT that they spend on Research and Development (R$\&$D).
In the plots, the horizontal and vertical coordinates of point representing each firm gives their ES and PAT values respectively. The PRD values of each firm are proportional to the areas around the points representing each firm. The areas are comparable between the two plots, i.e., equal areas in the two plots represent the same PRD values for the two years.
The ratio of the amount of money spent by Firm $\text{C}$ on $\text{R}$$\&$$\text{D}$ in $2019$ to that in $2023$ is closest to
- $5:6$
- $9: 5$
- $5: 9$
- $9: 4$