I believe the answer is: b.. He was the first Indian to serve in the British Parliament.
before entering the British parliament, Naoroji was known to be a succesful cotton trader. He was chosen as the member parliament of United Kingdom House of Commons between 1892 and 1895,and became one of the founders of Indian national congress after his position as the members of British parliament was finished/
The question is asking to choose among the following choices that state one of the Dadabhai Naoroji's major accomplishments, base on my research and further investigation, I would say that the answer would be letter <span>b. He was the first Indian to serve in the British Parliament, I hope this would help</span>
