The line chart given below shows the production of refrigerator by 6 companies.   What is the ratio of production of refrigerator by company C1 to the production of refrigerator by company C6?

4 : 1 2 : 1 1 : 3 1 : 2

2 : 1

Production by C1  :   Production by C6        100               :         50            2                :         1