The correct option is (c) It is a redox reaction.
Explanation:
Hydrolysis of XeF6 is nor a redox reaction.
XeF6 reacts violently with water, but slow hydrolysis by atmospheric moisture gives highly explosive solid, XeO3.
XeF6(s) + 3H2O(l) ---> XeO3(s) + 6HF(aq)
Partial hydrolysis of XeF6 yields XeOF4 and XeO2F2.
XeF6 + H2O ---> XeOF4 + 2HF
XeF6 + 2H2O ---> XeO2F2 + 4HF