The correct option is
D Through language, one can internalise andprivatise one's own experiences.
Let us look at these lines:
“Language has two primary purposes, expression and communication.”
Option (a) is true.
“the theory of language is
at certain points dependent upon a knowledge of the physical world”
The author states that the theory of language is at certain points (not all points) dependant on knowledge of the physical world.
Option (b) is true.
“Music may be considered as a form of language in which emotion is divorced from information, while the telephone book gives information without emotion”
So expression and emotion can be separate ideas in certain cases.
So (c) is also true.
So option (d) is the only option that cannot be concluded from this passage.
Language is used to externalize one’s own experience and not to internalize.
So the answer is option (d).