Introduction:
The passage states that a person, who was illiterate but determined, had come to the Congress Session to raise his concerns about the unfair landlord system in Bihar. It is asked which city he had come to where the Congress Session was taking place.

Answer:
The correct answer is option 'B' - Lucknow. Here's why:

Explanation:
1. Illiterate but resolute:
- The passage mentions that the person was illiterate, which means he could not read or write.
- Despite his illiteracy, he was determined and resolved to address the injustice of the landlord system in Bihar.

2. Congress Session:
- The passage states that the person had come to the Congress Session to voice his grievances about the landlord system.
- The Congress Session refers to a gathering or meeting organized by the Indian National Congress, a major political party in India.
- The Congress Sessions are held in different cities across India.

3. Identifying the city:
- To determine the city where the Congress Session was taking place, we need to consider the context and historical events.
- The passage does not explicitly mention the year or specific details about the Congress Session.
- However, we can deduce the city based on historical information and the prominence of the Indian National Congress.

4. Bihar and Uttar Pradesh:
- The passage mentions that the person came to the Congress Session to address the landlord system in Bihar.
- Bihar is a state located in eastern India, known for its agricultural economy and historical significance.
- Uttar Pradesh is a neighboring state to Bihar, located in northern India.
- Both Bihar and Uttar Pradesh have been centers of political movements and have hosted Congress Sessions in the past.

5. Eliminating options:
- Option 'A' - Kanpur: Kanpur is a city in Uttar Pradesh. While it is a significant industrial and commercial center, it is not traditionally associated with hosting Congress Sessions.
- Option 'C' - Gandhinagar: Gandhinagar is the capital city of Gujarat, a state in western India. It is not linked to the Congress Session mentioned in the passage.
- Option 'D' - New Delhi: New Delhi is the capital city of India and has been a significant venue for political events, including Congress Sessions. However, the passage specifically mentions Bihar, making it unlikely that New Delhi is the correct answer.

6. Conclusion:
- Considering the historical significance of Bihar and the context provided in the passage, the person in question has come to Lucknow, as it is the most likely city associated with hosting the Congress Session where he voiced his concerns.