Perfectly inelastic demand curves include constant price elasticities equivalent to zero as well as: (i) cannot exist within the real world across the full range of possible prices. (ii) happen more often than any other type. (iii) are horizontal lines within price/quantity space. (iv) imply such that the good has several close substitutes. (v) face classical firms within a competitive industry.
Please choose the right answer from above...I want your suggestion for the same.