The correct answer is: B. Scalar
Moment of inertia is a scalar quantity, which means it has a magnitude but no direction. It is a measure of the resistance of an object to changes in its rotation. The moment of inertia of an object depends on its mass and shape.
A vector quantity is a quantity that has both magnitude and direction. Examples of vector quantities include velocity, acceleration, and force.
A phasor is a complex number that represents a sinusoidal quantity. Phasors are used in electrical engineering to represent alternating current (AC) signals.
A tensor is a mathematical object that has multiple dimensions. Tensors are used in physics and engineering to represent quantities that have multiple components, such as stress and strain.