Given an example of a physical quantity which :
(a) has neither unit nor direction
(b) has direction but not a vector
(c) can be either a scalar no vector
(d) is nether a scalar nor a vector.

Answer

(a) referactive index, (b) pressure, (c) angular displacment, (d) moment of inertia

Explanation

(a) Relative density or referactive index.
(b) Electric current or pressure.
(c) Angular displacement. (d) Stress or moment of inertia.