Choose the correct alternative to replace the bold part to make the sentence grammatically correct.
Aditya and Rahul were shopping on a mall.

Correct option is B

✔️ The correct substitution is (b) at the mall.
Explanation:
The preposition "at" is correctly used to refer to specific public locations like malls, stations, schools, etc. “On” is used for surfaces and not for location of activities.
Grammatical Rule Used:
· Use “at” when referring to a specific point/place where an activity is happening.
· “Shopping at the mall” is the correct standard phrase.
Explanation in Hindi:
✔️ जब कोई गतिविधि एक निश्चित स्थान (जैसे मॉल, स्टेशन, स्कूल) पर हो रही हो, तो “at” प्रीपोजिशन का प्रयोग किया जाता है।
उदाहरण:
· We met at the mall.
· हम मॉल में मिले।
Meanings of Other Options:
· ❌ (a) Into the mall – Suggests movement from outside to inside. | Hindi: मॉल के अंदर की ओर जाना
· ❌ (c) By the mall – Suggests being near the mall, not inside or actively shopping. | Hindi: मॉल के पास
· ❌ (d) No improvement – "on a mall" is grammatically incorrect. | Hindi: “On a mall” वाक्य त्रुटिपूर्ण है।