One Word Substitutes - Verbal and Reasoning

Directions to SolveIn questions given below out of four alternatives, choose the one which can be substituted for the given word/sentence.
Q1:

A fixed orbit in space in relation to earth

A Geological

B Geo-synchronous

C Geo-centric

D Geo-stationary

ANS:D - Geo-stationary

No answer description is available.