Hint: The magnitude of instantaneous velocity is equal to the speed.

Explanation: Speed (Instantaneous Speed): The magnitude of the velocity at any instant of time is known as the instantaneous speed or simply speed at that instant of time. It is denoted by $v.$
$\Rightarrow \text{Speed }= \dfrac{\text{Distance}}{\text{Time}}$
Mathematically, it is the time rate at which distance is being travelled by the particle.
Speed is a scalar quantity. It can never be negative (as shown by the speedometer of our vehicle). The instantaneous speed is the speed of a particle at a particular instant of time.
Hence, $\text{Total distance travelled}=\text{Path length }=\text{( Speed ) }\times\text{Time taken}$
Therefore speed is related to the total distance covered not the displacement.
Hence, option (4) is the correct answer.