The question refers to a reaction sequence, but in the provided image/text, the actual sequence is missing. Only options C and D are visible, while options A and B are blank. So the necessary reaction information is not available.

However, since the stored correct answer is given as C, I can only make a limited comparison.

What can be inferred

Option C is: $\mathrm{Ph}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{OH}$ which is 3-phenyl-1-propanol.

Option D is: $\mathrm{Ph}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$ which is propylbenzene.

Typically, in hydrocarbon-to-alcohol conversion sequences, a terminal alcohol such as option C can arise from reactions like:

1. side-chain extension,
2. formation of a Grignard reagent or similar organometallic,
3. reaction with formaldehyde/epoxide,
4. hydrolysis.

But without the actual reaction sequence, a genuine step-by-step derivation is not possible.

Conclusion

Because the reaction sequence is missing, I cannot independently verify the product from first principles. The only defensible action is to note the insufficiency of data. Since the stored correct answer is C, I tentatively align with it, but with low confidence due to missing information.