Which of the following is a trade specifically listed under Entrance Exam 4?

The Elevator Constructor is a specific trade listed under Entrance Exam 4. This is significant because the Elevator Constructor trade involves specialized skills and knowledge related to the installation, maintenance, and repair of elevators, escalators, and similar systems. The requirements often include understanding complex mechanical and electrical systems, as well as safety regulations pertinent to working at heights and involving heavy machinery. This specialization is what distinguishes it within the context of the examination, as various trades have different scopes of work, training, and certification requirements.

The other trades mentioned, while also important and skilled professions, may not be categorized under Entrance Exam 4 for this specific context, highlighting the unique nature of the Elevator Constructor as recognized in the examination framework.