Among the following , what is the total number of speices which are very good oxidising agents/reducing agents/neither oxidising nor reducing ones ?
a. `F_(2)`
b. `F^(ө)`
c. `Na`
d. `Na^(o+)`
e. `MnO_(4)^(ө)`
f. `I^(ө)`
`Cl^(ө)`
h. `Ce^(4+)`
i. `Cr_(2)O_(7)^(2-)`
j. `CrO_(4)^(2-)`
k. `HNO_(3)`
l. `Fe^(2+)`