Consider the following statements:
In the case of gears of involute profiles, increase in the centre to centre distances between the mounting shafts
1. increase the pressure angle
2. will not affect the law of gearing
3. shortens the path of contact
4. increase the contact ratio
Which of the above statements are correct?
(a) 1, 2 and 4 (b) 1, 2 and 3
(c) 1, 3 and 4 (d) 2, 3 and 4