As in below figure demonstrates how consumption of goods A, B, C, and D varies like a family’s income changes. Of such goods, the only inferior good: (w) good A. (x) good B (y) good C. (z) good D.
![77_Income Elasticity of Demand.png](https://secure.tutorsglobe.com/CMSImages/77_Income%20Elasticity%20of%20Demand.png)
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