Correct option is C
The correct answer is
(c) To become king, queen etc.
Explanation:
The idiom
"to mount the throne" means to assume the position of a monarch, such as becoming king or queen.
Meanings of other options:
·
To bring disgrace to the family: To cause shame or dishonor.
·
To take the responsibility: To accept a duty or burden.
·
To leave one's palace: To exit or abandon a royal residence.
Correct sentence:
"The idiom 'to mount the throne' means
to become king or queen."