Question. Choose the one which best expresses the meaning of
DEMURE
(A) Intentional
(B) Timid
(C) Unreserved
(D) Blunt

Hint: For antonym and synonym type questions, do not make a guess. It is always good to revise vocabulary for this type of question.
Here Demure means “modest or shy”

Complete answer:
As we look through the options, we will understand the meaning of each option and check which one correctly represents ‘Demure’.
We are looking for an option which means or represents “modest or shy”.
Now, let's compare all the options given in the question.
(A) Intentional
The adjective Intentional means “done on purpose or deliberate”
Intentional does not represent the word Demure correctly as it represents confidence in doing the things on purpose. Hence, this cannot be the right answer.
Now we are left with 3 options. Among these, one is correct and two again are wrong. Let’s have a look at the second option.
(B) Timid
The word Timid is an adjective which means “showing a lack of courage or confidence or someone who can be easily frightened”, it does not represent “shy” exactly, but when fear always brings a lack of confidence and hence a shyness can be associated with it.
Hence “Timid” can be the answer.
Now we are left with 2 options. Among these, let’s check if we can find an adjective that is closer to Demure. Let’s have a look at the third option.
(C) Unreserved
The word Unreserved is also an adjective which means “frank and open.”, which is the opposite of “shy”.
Hence “Unreserved” cannot be the answer.
Now we are left with one option only. Let's have a look at option four and decide the right answer.
(D) Blunt
The word Blunt is also an adjective which means “uncompromisingly forthright.”, which is the opposite of “shy”.
Hence “Blunt” cannot be the answer.

Now, to conclude, “the right answer is option B”

Note: Sometimes we might not be to find the exact meaning of the words which are an exact match or opposite for this type of question, in this scenario we have to choose the one word which represents the closest meaning to the word in question.
Always check all the options before answering the question and avoid guessing.