Fill in the blanks with the most appropriate option:-

The sage has very good …………over the prominent world languages.

command

The correct option to fill in the blanks is command.

The sentence is about the sage's mastery of prominent world languages. The word "command" means to have complete control over something. It is the most appropriate word to use in this context, as it describes the sage's ability to use prominent world languages fluently and effectively.

The other options are not as appropriate:

• Knowledge means to have information about something. It is not as appropriate as "command", as it does not convey the same sense of mastery or control.
• Expertise means to have a very high level of skill or knowledge in a particular area. It is not as appropriate as "command", as it does not convey the same sense of fluency or effectiveness.
• Hold means to have possession of something. It is not as appropriate as "command", as it does not convey the same sense of mastery or control.