The First Session of the Indian National Congress was held in December 1885 in Bombay (now known as Mumbai), making option 'B' the correct answer.

The Indian National Congress (INC) was founded in 1885 with the aim of seeking political rights and representation for the Indian people under British colonial rule. The organization played a significant role in India's struggle for independence.

Below is a detailed explanation of the factors that led to the First Session of the Indian National Congress being held in Bombay:

1. Formation of the Indian National Congress:
- The Indian National Congress was formed as a result of the efforts of A.O. Hume, a retired British civil servant in India. He believed that the Indian people needed a platform to voice their concerns and demands.
- A.O. Hume sent out invitations to various Indian leaders and intellectuals to attend a meeting in Bombay to discuss the formation of an organization that would represent Indian interests.

2. Selection of Bombay as the Venue:
- The first session of the Indian National Congress was scheduled to be held in December 1885.
- Bombay was chosen as the venue for multiple reasons:
a) Accessibility: Bombay was a major port city and had good transportation links, making it easily accessible for delegates from different parts of India.
b) Political Importance: Bombay was a prominent center of trade and commerce, and it had a significant presence of educated elites who could contribute to the cause of Indian nationalism.
c) British Influence: The British Raj had a strong presence in Bombay, and holding the session there allowed the Congress to convey its message directly to the colonial rulers.

3. Proceedings of the First Session:
- The First Session of the Indian National Congress took place from December 28 to December 31, 1885.
- The session was attended by 72 delegates, mainly consisting of lawyers, journalists, and intellectuals.
- Important discussions during the session included the need for political reforms, the promotion of education, and the welfare of Indians under British rule.
- The Congress adopted a moderate approach and focused on constitutional methods to achieve its goals.

In conclusion, the First Session of the Indian National Congress was held in Bombay in December 1885. The choice of Bombay as the venue was strategic, considering its accessibility, political importance, and British influence. The session marked the beginning of a significant political movement that played a crucial role in India's struggle for independence.

The Subsidiary Alliance was basically a treaty between the British East India Company and, therefore, the Indian princely states, by virtue of which the Indian kingdoms lost their sovereignty to the English.
It was framed by Lord Wellesley, the Governor-General of India.
The Nawab of Awadh was the first ruler to enter into the subsidiary alliance with the British after the Battle of Buxar .