A compound 'A' on reaction with 'X' and 'Y' produces the same major product but different by-products 'a' and 'b'. Oxidation of 'a' gives a substance produced by ants.

'X' and 'Y' respectively are

A

$$KMnO_4/H^+$$ and dil. $$KMnO_4$$, $$273 \text{ K}$$

B

$$KMnO_4$$ (dilute), $$273 \text{ K}$$ and $$KMnO_4/H^+$$

C

$$KMnO_4/H^+$$ and $$O_3$$, $$H_2O/Zn$$

D

$$O_3$$, $$H_2O/Zn$$ and $$KMnO_4/H^+$$