To narrow it down to three groups, it would be strings, winds, and percussion.
the three main groups are that you gey(:
The three main groups in science are chemistry,biology and physics.
four
nincompoop
It has three main groups.
Class Agnatha
There are three main groups: Igneous, Sedimentary, and Metamorphic.
The 3 main groups of seedless vascular plants are: ferns, horsetails and club mosses.
four
Band and qwiure
Theravada, Mahayana, and Tibetan.
greek