Match List-I (system of forces) with List-II (definition) and select the correct answer using the codes given below the lists:

List - I		List - II
a.	Coplanar forces	1.	The forces, whose lines of action lie on the same line.
b.	Collinear forces	2.	The forces, meet at one point.
c.	Concurrent forces	3.	The forces, whose lines of action lie on the same plane.