Arrange the following diagrams in correct sequence of steps involved in the mechanism of catalysis, in accordance with modern adsorption theory.

1.  I$\to$II$\to$III$\to$IV$\to$V

2.  I$\to$III$\to$II$\to$IV$\to$V

3.   I$\to$III$\to$II$\to$V$\to$IV

4.   I$\to$II$\to$III$\to$V$\to$IV