Which of the following statements is correct regarding the Patna High Court's jurisdiction over the territory of Jharkhand prior to the Bihar Reorganisation Act, 2000?

Options:

• A: Jharkhand had its own independent High Court since 1956.
• B: The Patna High Court had no jurisdiction over the southern districts of Bihar (now Jharkhand).
• C: A permanent Circuit Bench of the Patna High Court was established at Ranchi in 1972, which later became a permanent Bench in 1976.
• D: The Calcutta High Court exercised concurrent jurisdiction over the Jharkhand region.

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