Which of the following is/are the function (s) of National Human Rights Commission?

all of the above.

The correct answer is Option 4- all of the above.

The National Human Rights Commission (NHRC) is an independent statutory body established in many countries, including India, with the primary mandate to protect and promote human rights. It acts as a watchdog for human rights violations and works towards ensuring justice for victims.

All the mentioned statements are its function:

Investigate alleged violations of human rights by the government or its officials.
Visit jails and other detention centers to assess the living conditions of inmates.
Intervene in court proceedings related to human rights violations (with court approval).

These functions are crucial for ensuring the protection and promotion of human rights in India.