Marina Exam for OIC: In the horizon system of coordinates what is equivalent to the meridian angle of the celestial equator system?

Marina Exam for OIC

In the horizon system of coordinates what is equivalent to the meridian angle of the celestial equator system? 

A. Azimuth angle 
B. Zenith distance 
C. Co-latitude 
D. Altitude 



Answer:  A. Azimuth angle