Step 1: Understanding the Concept:
Sequence involves substitution, followed by oxidative cleavage and further reaction leading to ring contraction.
Step 2: Detailed Explanation:
Cyclohexyl bromide reacts with NH\(_3\) to form amine (A).
On treatment with O\(_3\)/H\(_2\)O, oxidative cleavage occurs forming a diketone or dialdehyde (B).
Further reaction with BaO leads to rearrangement and ring contraction forming a smaller ring ketone.
Step 3: Final Answer:
Thus, the final product corresponds to option (C).