Which among the following States did record the formation of maximum Coalition Government in between 1967 to 1971?

The answer is Bihar. Between 1967 and 1971 Bihar saw the most frequent changes of government in the country, with several short-lived coalitions led by different Chief Ministers, including B.P. Mandal and Bhola Paswan Shastri in 1968. The Samyukta Vidhayak Dal and Shoshit Dal experiments kept breaking down, and President's Rule was imposed in between. Because of this instability, Bihar is the standard answer to this question.

• Uttar Pradesh (A): UP also had several coalition changes, such as Charan Singh's two stints, but the count is lower than Bihar's.
• Haryana (B): Haryana had several changes after the 1967 election, which is the origin of the phrase 'Aya Ram Gaya Ram', but not as many as Bihar.
• Punjab (D): Punjab had fewer coalition changes in this period. Its major instability came later.

The core concept is the coalition politics that followed the 1967 election, when Congress lost its majority in several states for the first time. The Governor's discretion, anti-defection concerns and President's Rule are useful Polity links for Mains.

Trap: candidates pick Haryana because of the 'Aya Ram Gaya Ram' phrase, or UP because of Charan Singh. Check the number of governments, not just the most famous episode. Exact counts vary by source, so verify against a standard reference.