Explanation:

- Option 1: Prohibition of discrimination against HIV infected persons

- This is a provision of the HIV/AIDS (Prevention and Control) Act, 2017, which seeks to eliminate discrimination on grounds of HIV status in employment, education, health care services, and public office.

- Option 2: HIV screening to be made mandatory before obtaining employment in the formal sector.

- This is NOT a provision of the HIV/AIDS (Prevention and Control) Act, 2017. The Act specifically prohibits mandatory HIV testing as a precondition for employment or access to any service.

- Option 3: Non-disclosure of HIV status without the informed consent of the infected person.

- This is a provision of the Act, which ensures confidentiality by forbidding disclosure of one’s HIV-positive status without their consent, unless required by a court order.

- Option 4: The act also calls for appointment of an ombudsman to hear complaints of violation of the act.

- This is a valid provision, establishing a mechanism to address grievances related to breaches of the Act.

Correct Answer: Option 2