Which one of the following is called the 'mother of constitution'?

Which one of the following is called the 'mother of constitution'?
British Constitution.

 The United Kingdom does not have a single, codified constitution. Instead, its constitution is composed of a variety of sources, including:

• Acts of Parliament: The UK Parliament has passed a number of Acts of Parliament that have constitutional significance, such as the Bill of Rights 1689, the Act of Settlement 1701, and the Parliament Acts 1911 and 1949.
• Conventions: There are also a number of unwritten conventions that form part of the UK constitution. These conventions are not legally binding, but they are generally accepted as binding by the government and the courts. For example, the convention is that the monarch must appoint the leader of the party with the most seats in the House of Commons as Prime Minister.
• Judicial decisions: The courts have also played a role in shaping the UK constitution. In a number of cases, the courts have interpreted the meaning of constitutional statutes and conventions, and have established new constitutional principles.
• Treaties: The UK is also bound by a number of treaties that have constitutional significance, such as the European Convention on Human Rights.

The UK's constitution is often described as "unwritten" or "flexible." This means that it is not contained in a single document, and that it can be changed more easily than a codified constitution. However, the UK's constitution is still a very important set of rules that govern the UK's government and society.

There are four main constitutional principles recognised by the courts:

• Parliamentary sovereignty: This principle means that Parliament has the supreme law-making power in the UK. No other body, including the courts, can override an Act of Parliament.
• The rule of law: This principle means that everyone is subject to the law, including the government. The law must be applied fairly and consistently, and no one is above the law.
• Democracy: This principle means that the UK is a democracy, and that the government is ultimately accountable to the people. The people have the right to vote in elections, and the government must respect the results of elections.
• Upholding international law: This principle means that the UK is bound by its international obligations, including treaties that it has signed. The UK must respect the rights of other countries, and it must comply with international law.

The UK's constitution is a complex and evolving system of laws and principles. It has been shaped by centuries of history, and it continues to be debated and shaped today.