Explanation:

Let’s break it down step by step:

- Total matches: With 4 teams, each team plays every other team twice—so 6 pairs × 2 matches = 12 matches total.

- Match wins: Chennai won 3, Mumbai 5, leaving 4 matches; those are split between Delhi and Kolkata, so 2 each.

- Draws: The 2 matches between Delhi and Kolkata were draws.

- Points system:

- Goal scored = +2 game points

- Goal conceded = -1 game point

- Win = 5 match points

- Mumbai vs Delhi: Mumbai wins by a 6-point difference. Delhi got 2 points (from goals/goals minus conceded), so Mumbai must have gotten 2 + 6 = 8 points from goals.

- Translating that to goals:

Let's call Mumbai’s goals = M, Delhi’s goals = D.

- For Delhi: 2 = 2D - M

- For Mumbai: 8 = 2M - D

- Solve these:

- D = (2 + M) / 2

- Substitute D in Mumbai’s equation: 8 = 2M - ((2 + M) / 2)

- 8 = 2M - 1 - M/2

- Multiply whole equation by 2:

16 = 4M - 2 - M

16 + 2 = 4M - M

18 = 3M ? M = 6

- D = (2 + 6) / 2 = 4

- So, the ratio of goals scored: Mumbai : Delhi = 6 : 4 = 3 : 2

- Let’s look at the options:

- Option 1: 3 : 2

- Option 2: 9 : 4

- Option 3: 8 : 3

- Option 4: 4 : 5

- Option 5: 1 : 1

- That makes option 1 (3:2) the correct answer.