Explanation:

Sure! Let's analyze the problem step by step:

- The speed of the boat along the current is 16 km/hr.

- The speed of the boat against the current is 12 km/hr.

- These two speeds can help us find the speed of the current.

To find the speed of the current:

- Calculate the difference between the two speeds: 16 km/hr (along the current) and 12 km/hr (against the current).

- This difference is due to the speed of the current affecting the boat's net speed.

$$\text{Speed of the current}=\frac{\text{Speed along current}-\text{Speed against current}}{2}=\frac{16-12}{2}=2\text{km/hr}$$

- So the speed of the current is 2 km/hr.

- Option 2: 2

Therefore, the correct answer is:

Option 2: 2