Upon heating`KCIO_(3)` in presence of catalytic amount of `MnO_(2)`, a gas `W` is formed. Excess amount of `W` reacts with white phosphours to given `X`. The reaction of `X` with pure `HNO_(3)` gives `Y` and `Z`.
W and X are, respectively
A. `O_(2) and P_(4)O_(10)`
B. `O_(2) and P_(4)O_(6)`
C. `O_(3) and P_(4)O_(6)`
D. `O_(3) and P_(4)O_(10)`