Answer :
Option (2)
Step-by-step explanation:
The total displacement covered divided by total time taken by an object is called the velocity of the object. It is a vector quantity. Mathematically, it is given by :
d is the displacement
t is the time taken
The quantity having both direction as well as magnitude are called vector quantity.
Option 1. shows the speed of an object as it is a scalar quantity.
Option 2. shows velocity of an object. It shows that the object is moving with a speed of 45 km/hr towards south.
Option 3. shows the acceleration of the object
Option 4. again shows the speed of the object.
Hence, this is the required solution.