Answer:
B. negative, positive
Step-by-step explanation:
Substitution effect : Price rise of a good makes it relatively expensive, decreases its demand. Price fall of a good makes it relatively cheap, increases its demand.
So: Substitution Effect is always negative as per above explanation.
Income Effect : Price rise of a good decreases real income/ real purchasing power of consumer & reduces demand of all goods. Price fall increases real purchasing power & increases demand of all goods.
Income effect is positive in case of Normal Goods, normal good demand is positively related to income. The effect is negative in case of inferior goods, inferior good demand is negatively related to income.
Hence: Price rise of rice - Substitution effect results in negative change in rice consumption. {∵substitution effect always negative}
Income Effect leads to positive change in rice consumption {∵price rise reduces real income & income effect is negative for inferior goods}