The correct answer is option 3 - Power of court of record. This power is conferred on both the Supreme Court and the High Courts. A court of record has the authority to maintain its own records and proceedings and to enforce its own judgments and orders. This means that the decisions and judgments made by both the Supreme Court and the High Courts are legally binding and can be used as precedent for future cases.

Option 1 - Advisory power is a power solely held by the Supreme Court. It allows the Supreme Court to give advice to the President and the Governor on matters of law or public interest when they seek it.

Option 2 - Power of doing complete justice in any cause or matter pending before the court is a power specifically held by the Supreme Court. It enables the Supreme Court to pass judgments that uphold justice and fairness.

Option 4 - Power to allow/refuse Special Leave Petitions is also exclusively held by the Supreme Court. Special Leave Petitions are requests made to the Supreme Court to grant permission to appeal a decision made by a lower court.

In summary, while options 1, 2, and 4 are powers conferred only on the Supreme Court, option 3 - Power of court of record - is also conferred on a High Court.