Explanation:

Here’s the thing: the session of Indian National Congress that openly supported the Swadeshi and boycott movement against the partition of Bengal in 1905 wasn’t Benaras.

Let’s break down the options:

- Option 1: Calcutta

- The 1906 Calcutta Session, led by Dadabhai Naoroji, was historic. It passed resolutions supporting the Swadeshi and boycott movement after the Bengal partition. This is the session that made the Swadeshi call an official Congress goal.

- Option 2: Belgaum

- This session happened later in 1924, presided over by Gandhi. No direct link to the 1905 Swadeshi or boycott agitation.

- Option 3: Karachi

- The Karachi Session was in 1931, way after the Swadeshi movement’s peak. It’s famous for its resolution on Fundamental Rights.

- Option 4: Benaras

- The Benaras Session of 1905 discussed moderates and extremists but didn’t explicitly support the Swadeshi and boycott movement. The main push for Swadeshi came later in Calcutta.

So, the correct answer is Option 1 - Calcutta.

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