Q. Consider the following identities for regular expressions: (a) (r + s)* = (s + r)* (b) (r*)* = r* (c) (r* s*)* = (r + s)* Which of the above identities are true? (Solved)
1. (a) and (b) only
2. (b) and (c) only
3. (c) and (a) only
4. (a), (b) and (c)
- d. (a), (b) and (c)