Does a fall in income have the same effect on demand for the given commodity?

Explanation

No, fall in income does not have the same effect on demand for the given commodity.
(i) If the given commodity is a normal good, the fall in income will reduce the demand for the normal goods.
(ii) If the given commodity is an inferior good, the fall in income will raise the demand for the inferior goods.
(iii) If the given commodity is a necessity, the fall in income will not change the demand for the necessity of goods.