Question : Which of these does not cause a shift in the demand curve?
Option 1: Advertisement
Option 2: Product price
Option 3: Income
Option 4: Related product price
Correct Answer: Related product price
Solution :
Change in demand done with the other than the product price.
A change in demand describes a shift in consumer desire to purchase a particular good or service, irrespective of a variation in its price.
Hence option d is the correct answer.