11) Conference : Chairman :: Newspaper : ?
Explanation: As Chairman is the highest authority in a conference similarly Editor is in Newspaper.
12) Safe : Secure :: Protect : ?
Explanation: As safe ans secure have same meaning in the same way protect and guard have same meaning.
13) Master : OCUVGT :: LABOUR : ?
14) Microphone : Loud :: Microscope : ?
Explanation: As Microphone makes sound louder similarly Microscope makes the object magnified.
15) Melt : Liquid :: Freeze : ?
Explanation: As on melting, liquid is formed similarly on freezing solid is formed.
16) College : Student :: Hospital : ?
Explanation: As Students read in College similarly Patients are treated in Hospital.
17) Tree : Forest :: Grass : ?
Explanation: As Tree is found in Forest similarly Grass is found in Lawn.
18) South : North-West :: West : ?
Explanation: As North-West is 135o clockwise from South in the same were North-East is 135o clockwise from the West.
19) Cloth : Mill :: Newspaper : ?
Explanation: As Cloth is made in a Mill, similarly Newspaper is printed in press.
20) Country : President :: State : ?
Explanation: As President is the nominal head of a country, similarly Governer is the nominal head of a State.