Consider the following statements
The principle of motion economy related to the use of human body is that the two hands should
1. Begin as well as complete their motions at the same time
2. Not be idle at the same time except during rest
3. Be relieved of all work that can be done more advantageously by a jig, fixture or
foot –operated device
Which of these statements are correct?
(a) 1,2 and 3 (b) 1 and 2 (c) 2 and 3 (d) 1 and 3