# Relation between number of links & lower pairs - Theory of Machines - 1

**Q. The relation between number of links and number of lower pairs is given as n = 2p – 4. If L.H.S is less than R.H.S of this equation then the chain is***- Published on 06 Aug 15***a.** constrained

**b.** locked

**c.** structure

**d.** unconstrained

**ANSWER: unconstrained**