The species which undergo disproportionation in alkaline medium is/ are

The spicies that undergo disproportionanion in alkaline medium are

The speicies that undergoes disproportionation in an alkaline medium is

The species that undergoes diproportionation in an alkaline medium are:

The species that undergoes disproportionational is an alkaline medium are

The species that undergo(es) disproportionation in al alkaline medium is/are:

Find the total number of species which would undergo disproportionation in alkaline medium. NO_(2),Cr_(2)O_(7)^(2-), Cl_(2)O_(6),Br_(2),P_(4),S_(8),Al_(2)O_(3)