Explanation: The Indian Constitution guarantees a set of Fundamental Rights to its citizens, which are essential for the protection of individual freedoms and the promotion of social justice. These rights are enshrined in Part III of the Constitution and are enforceable by the courts. The Fundamental Rights include the Right to Equality, Right to Freedom, Right against Exploitation, Right to Freedom of Religion, Cultural and Educational Rights, and Right to Constitutional Remedies.
One of the Fundamental Rights is the Right against Exploitation, which includes the prohibition of forced labor, the abolition of the employment of children in factories, and the prohibition of traffic in human beings and begar (forced labor). The Minimum Wages Act, 1948, is a law that ensures that workers receive a minimum wage for their labor. Not paying the minimum wage is a direct violation of the Right against Exploitation, as it exploits the worker by not providing fair compensation for their labor.
In contrast, the other options do not necessarily violate Fundamental Rights. Banning a book can be a restriction on the Right to Freedom of Speech and Expression, but it is not a violation if the restriction is reasonable and in the interest of public order, decency, or morality. Similarly, banning the use of loudspeakers after 9 pm can be a restriction on the Right to Freedom of Speech and Expression, but it is not a violation if the restriction is reasonable and aimed at maintaining public order and preventing noise pollution. Making a speech is a fundamental right, and it is not a violation of Fundamental Rights unless the speech incites violence, hatred, or is otherwise against public order, decency, or morality.
Therefore, the correct answer is (A) Not paying minimum wages, as it is a clear violation of the Right against Exploitation, which is a Fundamental Right guaranteed by the Indian Constitution.