Consider the following statements: A 
stub tooth system is generally preferred in spur gears as it results in
1. Stronger teeth
2. Lesser number of teeth on the pinion
3. Lesser changes of surface fatigue failure
4. Reduction of interference
Which of the above statements are correct?
(a) 1,2 and 4 (b) 3 and 4
(c) 1 and 3 (d)1, 2, 3 and 4