Congress Party observed 26th January 1930 as :

Correct option is B

The Congress Party observed 26th January 1930 as Independence Day.
· On 26th January 1930, the Indian National Congress under the leadership of Mahatma Gandhi observed it as Independence Day.
· This was a significant moment in the struggle for India's independence, and it marked the beginning of the Civil Disobedience Movement, also known as the Dandi March or Salt Satyagraha, which aimed to challenge the British colonial rule in India.
· The Indian National Congress, on 19 December 1929, passed 'Purna Swaraj' at its Lahore session.
· Jawaharlal Nehru was the president of the Indian National Congress during the Lahore session.