The displacement of two bones in which the articular surfaces partially lose contact with each other is called a. subluxation. b. dislocation. c. sublimation. d. subjugation

Subluxation.

Explanation:

Subluxation may be defined as the significant structural displacement of the tissue or the organ of the body. This can be easily diagnosed by the X rays technique.

The two bones are displaced in the articular surfaces and later they lose contact with each other in subluxation. The subluxation may occur in the eye as well.

Thus, the correct answer is option (a).