(a) ballpoint pens The price elasticity of ballpoint pen will be elastic because there are many substitutes. But at the same time, elasticity will not be high because of lower prices of pens and not being the durable goods as well. (b) Crest toothpaste Demand will be highly elastic because several substitutes. And this brand is not the necessity. c) diamond rings The price elasticity of demand will be highly elastic because the price of diamond rings are high and not affordable to all. Step-by-step explanation (d) sugar The price elasticity of sugar will be inelastic because there are least substitutes of sugar and it is most preferred item of food. (e) refrigerators The price elasticity of refrigerators is inelastic because it has not close substitute. It is necessity of today's life