Regular Exp

Question

which of the following regular exp represetn the set of all string over{0,1} ending with 00

1. (0+1)*00+   2. 00+(0+1)+ +00  3. Both

Answer 1

clearly 1 is correct (0+1)*00

Comments

00+(0+1)+ +00     write regular expression  clearly ?

---

$00 + (0+1)^+ + 00$  if this is regular expression then  2 option will not be our answer