Correct option is B
The correct option is (b).
Explanation:
• The verb “dine” commonly takes the preposition “at” when we refer to a place/venue (hotel, restaurant, event).
• Therefore, “has been dining at five-star hotels” is the correct and standard usage to indicate location.
• Correct answer word – at
Meaning: shows a specific place/venue (किसी स्थान/स्थल पर).
Example: They dined at a luxury hotel last night.
Meanings of other options and why they are incorrect:
• (a) in – indicates inside/within (के अंदर). Though possible in some contexts, standard collocation is “dine at” a hotel/restaurant.
• (c) with – indicates company/along with (के साथ). It would mean dining with someone, not a place.
• (d) for – indicates purpose/duration (के लिए). It does not fit with “dining” to show place.
So the correct answer is (b)