Explanation:

- The Swadeshi movement was a significant part of the Indian freedom struggle. It emphasized self-reliance by boycotting British goods.

- On 7 August 1905, the official proclamation of the Swadeshi movement took place.

- Option 1: Wellington Square, Calcutta - This location was not where the formal proclamation occurred.

- Option 2: Calcutta Town Hall - This is indeed the location where the formal proclamation of the Swadeshi movement was made on 7 August 1905.

- Option 3: Kanai Dhar Lane, Calcutta - This location didn't have any significant association with the proclamation event.

- Option 4: Bengal National College, Calcutta - Although this college played a role in the education sector, it was not linked to the Swadeshi proclamation event.

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