This question tests how well test takers know the corporate structure behind a well known motorcycle brand. Let's look at each named company.
The Bullet is manufactured and marketed under the Royal Enfield name, a brand that operates within the Eicher Group but is not itself listed among the answer choices, so the correct response is that none of the given companies is the direct maker.
Let's summarize:
So the correct answer is option (d), None of these.