Step 1: Write the percentage-increase formula.
Percentage increase = [(2006 sales - 2005 sales) / 2005 sales] x 100.
Step 2: Read the values for each option from the chart.
Voveran: 2005 ~ 16 crore, 2006 ~ 23 crore.
Volini: 2005 ~ 6.5 crore, 2006 ~ 9.5 crore.
Dolonex: 2005 ~ 6 crore, 2006 ~ 10 crore.
Sumo: 2005 ~ 5 crore, 2006 ~ 7 crore.
Step 3: Compute each percentage increase.
Voveran: (23-16)/16 x 100 = 7/16 x 100 ~ 43.8%.
Volini: (9.5-6.5)/6.5 x 100 = 3/6.5 x 100 ~ 46.2%.
Dolonex: (10-6)/6 x 100 = 4/6 x 100 ~ 66.7%.
Sumo: (7-5)/5 x 100 = 2/5 x 100 = 40%.
Step 4: Compare and conclude.
Dolonex shows the largest percentage jump, about 66.7%, clearly ahead of Volini (~46.2%), Voveran (~43.8%) and Sumo (40%). Even though Dolonex's absolute sales figures (6 to 10 crore) are smaller than Voveran's, its relative growth is the fastest of the four, because percentage increase depends on growth relative to the smaller starting base, not the absolute rupee jump. So Dolonex has the highest percentage increase, matching option 3.