Which of the following is a divergent boundary?

a. Continental-continental

b. Transform

c. Oceanic-continental

d. Rift valley

Among the choices given, an example of the divergent boundary is letter C. Oceanic-continental. When we speak of divergent boundary, we also refer to the constructive or extensional boundary. This is a feature which is linear in nature and exist between two tectonic plates that tend to move away from each other.