Assertion (A): Numerically controlled machines having more than three axes do not exist.
Reason (R): There are only three Cartesian coordinates namely x – y – z.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true