I know that multiple inheritances between Interfaces is possible, e.g.:
public interface C extends A,B {...} //Where A, B and C are Interfaces
Yes, it is possible. This is the catch: java does not support multiple inheritance, i.e. class cannot extend more than one class. However class can implement multiple interfaces.
An interface can extend other interfaces. Also an interface cannot implement any other interface. When it comes to a class, it can extend one other class and implement any number of interfaces.
class A extends B implements C,D{...}