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Consider the bar chart and answer questions based on it. 
The bar chart represents sales of four companies C1, C2, C3 and C4 (in millions) for the year 2012, 2013 and 2014.

Which two companies showed increase in their sales from 2012 to 2013?

[RRB NTPC 30 March 2016 Shift 1]
A
B
C
D