The oxidation of benzene by V₂O₅ in the presence of air produces?

1. Benzoic anhydride

2. Maleic anhydride

3. Benzoic acid

4. Benzaldehyde

 A compound that cannot give Friedel-Craft’s reaction is: 

The order of decreasing reactivity towards an electrophilic reagent, for the following: 
(i) Benzene (ii) Toluene 
(iii) Chlorobenzene and 
(iv) Phenol 

would be:

1. (i) > (ii) > (iii) > (iv)

2. (ii) > (iv) > (i) > (iii)

3. (iv) > (iii) > (ii) > (i)

4. (iv) > (ii) > (i) > (iii)