Explanation: To understand the context of the Hyderabad State and its integration into the Indian Union, it is essential to delve into the history of the princely states in India. At the time of India's independence in 1947, the country was divided into two main categories: British India and the princely states. British India was directly governed by the British, while the princely states were ruled by local rulers under the suzerainty of the British Crown.
The Hyderabad State, ruled by the Nizam dynasty, was one of the largest and most populous princely states. The last Nizam, Mir Osman Ali Khan, was the ruler of Hyderabad at the time of India's independence. Initially, the Nizam was reluctant to join the Indian Union and wanted to maintain Hyderabad's independence. This stance was in line with the policy of the British, who had granted the princely states the option to join either India or Pakistan or remain independent.
However, the situation in Hyderabad was complicated by the presence of a large Muslim population under a Hindu-majority India and the Nizam's refusal to accede to the Indian Union. This led to a period of political tension and violence, culminating in the Police Action of 1948. The Indian Army intervened to annex Hyderabad, and on September 17, 1948, the state was formally integrated into the Indian Union.
Therefore, the statement that "Even after independence people of Hyderabad princely state were under Nizam rule" is correct. The Nizam's rule continued until the Police Action, which was several months after India's independence. The statement that "Hyderabad joined Indian union on the day of Independence" is incorrect, as the integration occurred in September 1948, not on August 15, 1947.
Understanding the historical context and the specific events surrounding the integration of Hyderabad into the Indian Union is crucial for comprehending the complexities of India's post-independence political landscape. This knowledge is particularly relevant for students studying Telangana General Knowledge, as it forms a significant part of the region's history and political development.