The magnitude of a component of a vector must be:

a. equal to the magnitude of the vector.

b. greater than or equal to the magnitude of the vector.

c. less than, equal to, or greater than the magnitude of the vector.

d. less than or equal to the magnitude of the vector.

(d) Less than or equal to the magnitude of vector

Explanation:

The magnitude of any vector is vector sum of magnitude of its component

As magnitude of vector is sum of its component so magnitude of its component never be greater than the magnitude of vector

It can be equal to the magnitude of vector in one case when the magnitude of other component of the vector is zero

So it can be less or equal to the magnitude of vector