Choose the correct statement 
 

Temperature is a scalar but temperature gradient is a vector, as gradient of any scalar quantity is a Vector. 
Velocity of a body is a vector as it has both magnitude and direction but velocity of light is a scalar because law of vector addition does not hold true for velocity of light.
Electric intensity of a charged body is nothing but electric field intensity and its direction is determined by the direction of force a unit positive test charge would experience due to that body  
Electric current density is current passing through a unit cross section area perpendicularly, direction of current density is along the direction of current.