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Explanation:

Let the total cost of the store in 2016 be 100. 
From (1): Total revenue in 2016 = 2 × Total cost in 2016 = 2 × 100 = 200.
From (2): Total revenue in 2017 = 2 × Total revenue in 2016 = 2 × 200 = 400.
From (2): Total cost in 2018 = 2  × Total cost in 2016 = 2 × 100 = 200.
So, we can find the department wise revenue in 2016 and 2017 and cost in 2016 and 2018 using the percentages found from the radar graph.

From (3): Cost from Electronics in 2017 = Revenue from Electronics in 2017 = 120. 
So total cost in 2017 = 120/40% = 300. And hence the department wise costs can be found for 2017.
From (4): Revenue from Clothing department in 2018 = Cost for the Produce departement in 2018 =  100.
So total revenue in 2018 = 100/40% = 250. 

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Revenue generated from the Produce department in 2017 to that in 2018 = 160 : 100 = 8 : 5.

Hence option (b). 

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