Congress Session at Calcutta in 1906 was presided over by Dadabhai Naoroji.

Explanation:
- Dadabhai Naoroji was an Indian political leader and a key figure in the Indian National Congress.
- He was born on 4 September 1825 in Bombay Presidency, British India.
- Naoroji was known for his contributions to the Indian independence movement and his advocacy for the rights of Indians in British-ruled India.
- He is often referred to as the "Grand Old Man of India" and was the first Asian to be elected to the British Parliament.
- Naoroji played a crucial role in the formation of the Indian National Congress, which was established in 1885 as a platform for political and social reforms.
- The Congress Session at Calcutta in 1906 was a significant event in the history of the Indian National Congress.
- It was during this session that the demand for Swaraj (self-rule) was officially made by the Indian National Congress.
- The session was presided over by Dadabhai Naoroji, who was highly respected and regarded as a senior leader within the Congress.
- Naoroji's presidency during this session symbolized his influence and importance within the Indian National Congress.
- The Congress Session at Calcutta in 1906 marked a turning point in the Indian independence movement, as it laid the foundation for the subsequent demand for complete independence from British rule.
- Dadabhai Naoroji's leadership and contribution to the Congress Session at Calcutta in 1906 played a crucial role in shaping the future direction of the Indian National Congress and the struggle for independence.