The correct option is B 6-5, 4-2 and 2-0
Possible cases:
i) Atlentico De Kolkata - 6 5 2 4 1 1
Delhi Dynamos - 5 6 0 2 1 4
ii) Atlentico De Kolkata - 6 5 2 4 1 1
Delhi Dynamos - 4 5 1 0 6 2
iii) Atlentico De Kolkata - 6 5 2 4 1 1
Delhi Dynamos - 1 5 0 2 4 6
As shown in case i), If one of the matches had the score of 1-1, the scenario will be: Delhi Dynamos lost with a score of 5, so the score has to be 6-5 in favour of Atlentico De Kolkata. Again, Atlentico De Kolkata lost with the odd score of 5, so the score has to be 5-6 in favour of Delhi Dynamos. Now, Atlentico De Kolkata win with goals of 4 and 2 in the other 2 games and the possible score for Delhi Dynamos in these two matches is 0,2 and 4. Fro Atlentico De Kolkata to win a score of 2, Delhi Dynamos has to score goals. That leaves the third win for Atlentico De Kolkata to have the score of 4-2.