Consider the following statements regarding grinding of high carbon steel
1. Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.
2. Aluminium oxide wheels are employe(d)
3. The grinding wheel has to be open structure Of these statements
(a) 1,2 and 3 correct
(b) 1 and 2 are correct
(c) 1 and 3 are correct
(d) 2 and 3 are correct