The figure shows six monosubstituted benzenes, I to VI, each nitrated in its own flask. (i) I and IV give mainly ortho and para products. (ii) II, III and V give mainly the meta product. (iii) VI gives mainly the meta product, as its methyl group gives electrons to the ring. (iv) In II, electron density falls most at ortho and para, so attack goes to meta. (v) I reacts more slowly than benzene. (vi) III reacts more slowly than benzene. How many of the statements above are correct?

Fig. 1: Six monosubstituted benzene rings drawn as skeletal structures in two rows, labelled I to VI. I carries a methoxy group, OCH3. II carries a nitro group, NO2, with a positive charge on N and a negative charge on one O. III carries an aldehyde group, CHO. IV carries an NHCOCH3 group, the nitrogen joined to the ring. V carries a cyano group, CN. VI carries a methyl group, CH3.