Explanation
A small change in demand can lead to large price rises.مانگ میں ایک چھوٹی سی تبدیلی قیمت میں اضافے کا باعث بن سکتی ہے۔The correct preposition is "in," as it indicates a change within the concept of demand."A small change in demand" accurately reflects the relationship between fluctuations in demand and their effects.
