The correct answer is Bhavnagar.
Bhavnagar was the first princely state in Saurashtra to merge with the Indian Union on 15 August 1947. The ruler of Bhavnagar, Maharaja Khengarji III, announced his decision to merge the state with India on 14 August 1947, a day before India’s independence. The merger was accepted by the Indian government on 15 August 1947.
Junagadh was the second princely state in Saurashtra to merge with the Indian Union, on 9 November 1947. The ruler of Junagadh, Nawab Muhammad Mahabat Khan III, had initially announced his intention to merge the state with Pakistan, but this decision was opposed by the people of Junagadh. The Indian government intervened and took control of the state on 9 November 1947.
Nawanagar was the third princely state in Saurashtra to merge with the Indian Union, on 15 December 1947. The ruler of Nawanagar, Maharaja Jam Saheb Digvijaysinhji Ranjitsinhji, had initially announced his intention to remain independent, but he eventually agreed to merge the state with India.
Porbandar was the fourth and final princely state in Saurashtra to merge with the Indian Union, on 1 January 1948. The ruler of Porbandar, Maharaja Jam Saheb Bhupendrasinhji, had initially announced his intention to remain independent, but he eventually agreed to merge the state with India.
The merger of the princely states of Saurashtra with the Indian Union was a significant event in the history of India. It marked the end of the British Raj and the beginning of a new era for India.