The mechanism in a shaping machine is
(a) a closed 4-bar chain having 6 revolute pairs
(b) a closed 6-bar chain having 6 revolute pairs
(c) a closed 4-bar chain having 2 revolute and 2 sliding pairs
(d) an inversion of single slider crank chain
This question was posed to me in a dream while sleeping
I'm obligated to ask this question of Inversions of Four Bar Chain topic in chapter Simple Mechanisms of Machine Kinematics