Which statement gives the economic definition of demand for a commodity?
The desire for a commodity backed by ability and willingness to pay is demand
Demand is a desire supported by both willingness and ability to pay. The car–petrol statement may also be true because they are complements, but it describes a relationship between goods rather than defining demand.
| List-I (Relief Materials) | List-II (Color Code) |
| A. Shelter | I. Yellow |
| B. Clothes | II. Khaki |
| C. Food | III. Red |
| D. Medicine | IV. Brown |
Which of the following is NOT a state function or state variable in a thermodynamic system?