The following table shows the number of vacancies of sub-inspector in different states. Study the table carefully and answer the following question.
$$
\begin{array}{|c|c|c|c|c|c|}
\hline \text { Year } & \text { Haryana } & \text { Uttarakhand } & \text { Uttar Pradesh } & \text { Bihar } & \text { Himachal } \\
\hline 2018 & 3500 & 1200 & 6000 & 2500 & 1500 \\
\hline 2019 & 3000 & 1500 & 4500 & 3000 & 2200 \\
\hline 2020 & 3200 & 1800 & 5000 & 3200 & 3000 \\
\hline 2021 & 2300 & 1500 & 4200 & 2300 & 1600 \\
\hline
\end{array}
$$
What is the difference between the average vacancy of Uttarakhand and the average vacancy Bihar in all four years?
(a) 1250
(b) 1500
(c) 1350
(d) 1400