The double slider—crank chain is shown below in the diagram in its three possible inversions. The link shown hatched is the fixed link
Which one of the following statements is correct?
(a) Inversion (1) is for ellipse trammel and inversion (2) is for Oldham coupling
(b) Inversion (1) is for ellipse trammel and inversion(3) is for Oldham coupling
(c) Inversion (2) is for ellipse trammel and inversion (3) is for Oldham coupling
(d) Inversion (3) is for ellipse trammel and inversion (2) is for Oldham coupling