The zonal gradient of meridional current and the meridional gradient of zonal current is $-0.3 \times 10^{-3} \mathrm{~s}^{-1}$ and $0.3 \times 10^{-3} \mathrm{~s}^{-1}$, respectively, at a location $\mathrm{P}\left(87^{\circ} \mathrm{E}\right.$, $\left.15^{\circ} \mathrm{N}\right)$. Which one of the following best explains the nature of the flow?
- The flow is non-divergent in nature.
- The flow is non-rotational in nature.
- The flow is counter-clockwise in nature.
- The flow is clockwise in nature.
