Explanation:

- Analyze the phrases and their respective codes:

- 'Army of India Good' = 'ff mm aa ee'

- 'Navy and Airforce Best' = 'dd cc md oo'

- 'India Navy is Best' = 'md aa bc oo'

- 'Airforce are Army India' = 'aa dd rr ff'

- Identify common words and codes:

- 'India' appears in the first, third, and fourth phrases and is coded as 'aa'.

- 'Army' appears in the first and fourth phrases and is coded as 'ff'.

- 'Best' appears in the second and third phrases and is coded as 'md'.

- Codes remaining for 'are' in the fourth phrase, as it is the unique word are 'rr'.

- Cross-verifying options:

- Option 1: 'ac' -> irrelevant code

- Option 2: 'oo' -> Code for 'Navy'

- Option 3: 'cc' -> Code for 'and'

- Option 4: Either I or II -> Not relevant

- Option 5: 'rr' -> Matches 'are'

- The correct code for ‘are’ is 'rr'.