Answer : 4. "सूर्य सेन"
Explanation :

1. Among the following revolutionaries, Surya Sen was known as 'Master Da'.

2. He was an Indian revolutionary who led the Chittagong Armory Raid of 1930.

3. He was a school teacher by profession and was popularly known as Master Da.

4. In 1918, he was elected as the President of the Chittagong branch of the Indian National Congress.