Which of the following is NOT a part of the All India Services?

Indian Engineering Service 

The correct answer is Option 2 - Indian Engineering Service

The Indian Engineering Service is not a part of the All India Services.

The All India Services consist of the Indian Administrative Service (IAS), Indian Police Service (IPS), and Indian Forest Service (IFoS). These services are responsible for various administrative, policing, and forestry roles, respectively, at the national and state levels. However, the Indian Engineering Service (IES) is a group A and group B gazetted engineering service of the Government of India, which recruits engineers to various government departments for technical and managerial roles.