The computer that combines the functions of both analog and digital computers is called ?

Computers can be classified by the type of processing technology they combine, based on whether they handle continuous or discrete data.

A hybrid computer is built to combine the features of both analog and digital computers in one system. It accepts and processes continuously varying physical measurements the way an analog computer does, converts these into digital form, and then processes them with the speed and precision of a digital computer. Hybrid computers are commonly used in situations that need continuous real-world measurement combined with digital accuracy, such as monitoring equipment in hospital intensive care units.

The other options describe single-technology or informal categories. A digital computer processes only discrete binary data, and an analog computer processes only continuous physical quantities; neither combines both approaches by definition. "Multipurpose computer" is not a standard classification term describing this combination of analog and digital functions in computer studies.

When a question describes a computer that "combines" analog and digital functions, that specific combination is the defining feature of a hybrid computer.