Correct option is (a) True
The best I can explain: A one-dimensional element possesses one degree of freedom at each node. It is also known as a bar element or line element. Geometry and other parameters of a bar element are defined in terms of one spatial coordinate only. If a one-dimensional element has two nodes with corresponding displacements u1, u2 and corresponding shape functions N1, N2, then the displacement function is given by N1u1+N2u2.