The correct answer is A. law of the mob.
Lynch law is a form of extrajudicial punishment in which a person is put to death (or otherwise punished) by a mob, often by hanging, without due process of law. It is a form of vigilantism that is often carried out in response to a perceived crime or injustice.
Lynch law has been used throughout history, but it has been particularly common in the United States. In the 19th and early 20th centuries, lynching was used as a way to control and intimidate African Americans. Thousands of African Americans were lynched during this period, often for minor offenses or no offense at all.
Lynch law is still practiced in some parts of the world, but it is generally considered to be a violation of human rights. In the United States, lynching is a federal crime, and it is punishable by up to life in prison.
The other options are incorrect because they do not describe lynch law. Option B, law of the underworld, refers to the rules and regulations that govern criminal activity. Option C, law of the constitution, refers to the laws that are set forth in a country’s constitution. Option D, law of the parliament, refers to the laws that are passed by a country’s parliament.