Question : Which one is not the type of elasticity of demand?

Question : The elasticity of demand for price is:

Question : Assertion: The price elasticity of demand for a product is determined solely by the availability of substitutes.

Reason: The more substitutes available for a product, the higher its price elasticity of demand.

Question : Assertion: The price elasticity of demand for a product can vary along its demand curve.

Reason: The price elasticity of demand depends on the slope and shape of the demand curve.