Consider the following statements: Helical gears may be designed in applications where gears are to be mounted on
1. Non–parallel shafts
2. Parallel shafts
3. Intersecting shafts.
4.Non–parallel and non–intersecting shafts
Which of the above statements is/are correct?
(a) 1, 2 and 3 only (b) 1, 2, 3 and 4
(c) 1 only (d) 2 and 4