Answer:
The length of NP is 2 units.
Explanation:
Given the radius of 5 units and the length of MP is 4 units in the circle
we have to find the length of NP
OL=OM=5 units ( ∵ Radii of same circle)
In ΔOMP, by Pythagoras theorem




As we see



Hence, the length of NP is 2 units.
Option D is correct.