Zero price elasticity of demand means

Zero price elasticity of demand means

whatever the change in price, there is absolutely no change in demand
for a small change in price, there is a small change in demand
for a small change in price, there is a large change in demand
for a large change in price, there is a small change in demand
This question was previously asked in
UPSC CAPF – 2019
Zero price elasticity of demand means that the quantity demanded of a good or service does not change at all, regardless of the change in its price. This is a case of perfectly inelastic demand.
– Price elasticity of demand (PED) measures the responsiveness of quantity demanded to a change in price.
– PED = (% Change in Quantity Demanded) / (% Change in Price).
– If PED = 0, the numerator (% Change in Quantity Demanded) must be 0, implying no change in quantity demanded.
Demand is considered inelastic if 0 < PED < 1 (quantity demanded changes proportionally less than price). Demand is considered elastic if PED > 1 (quantity demanded changes proportionally more than price). Demand is unit elastic if PED = 1 (quantity demanded changes proportionally the same as price). Perfectly elastic demand (PED = infinity) means consumers will buy an infinite amount at a specific price but nothing if the price increases even slightly.