Answer: Option (a) is correct.
Step-by-step explanation:
The demand curve for a particular good represents the relationship between the price of a good and quantity demanded for a good. The demand curve of a good is normally downward sloping. Law of demand states that there is an inverse relationship between the price of a good and quantity demanded for a good. This means that an increase in the price of a good will lead to reduce the quantity demanded for that good and a decrease in the price of a good will lead to increase the quantity demanded for that good.