Explanation:

- The inaugural air transport flight in India occurred in 1911.

- Allahabad and Naini: This is indeed the correct pair. The flight was a historic airmail journey from Allahabad to Naini, covering a distance of approximately 10 kilometers.

- Allahabad and Jaipur: This option is incorrect. There was no such flight between these two cities in 1911.

- Allahabad and Kanpur: This incorrect option mentions two notable cities but does not represent the historical 1911 event.

- Allahabad and Delhi: This option is also incorrect as the historic flight did not connect these two cities.