The correct statements among the following regarding a complex reaction are-

(a) Order of the overall reaction is the same as the molecularity of the slowest step.
(b) Order of the overall reaction is less than the molecularity of the slowest step.
(c) Order of the overall reaction is greater than the molecularity of the slowest step.
(d) The molecularity of the slowest step is never zero or non-integer.
 

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)