The reactivity of a benzene ring towards electrophilic substitution depends on the nature of the substituents attached to it. Activating groups (electron-donating groups like $-\text{CH}_3$, $-\text{OH}$, $-\text{NH}_2$) increase the electron density on the ring, making it more reactive towards electrophiles . Conversely, deactivating groups (electron-withdrawing groups like $-\text{NO}_2$, $-\text{CN}$, $-\text{CHO}$) decrease the electron density, making the ring less reactive . Halogens are also deactivating due to their strong -I effect . Without the specific structures, the exact compounds cannot be identified, but the general order of reactivity is: molecules with strong deactivating groups < molecules with weak deactivating groups < benzene < molecules with activating groups.

Note: The specific chemical structures for the compounds (I, II, III, IV) were missing from the input data. Option 1 is marked correct based on the provided probable answer.