(i) Rice in West Bengal: Inelastic demand since rice in West Bengal is the staple food and hence, it is a necessity.
(ii) Rolex watches: Elastic demand because Rolex watch is a luxury and hence it will have an elastic demand.
(iii) Matchboxes: Matchboxes will have a relatively inelastic demand since matchboxes costs really less.
(iv) Bicycles: Bicycles will have a relatively elastic demand since bicycle is not a necessity.