Increase in demand refers to :
Increase in demand refers to :
Solution
✅ Correct Option: 3
Increase in demand means a shift of the entire demand curve to the right, caused by factors other than own price (like rise in price of substitutes, rise in income, etc.). Option 1 is increase in quantity demanded (movement along the curve). Option 3 describes a rise in substitute price, which makes the given good relatively cheaper, shifting demand rightward -- this is an increase in demand.
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