obscure (Adjective) : not well–known; unknown
evident (Adjective) : easily seen; obvious; clear
definite (Adjective) : sure; certain; unlikely to change; clear
careless (Adjective) : not being careful
clear (Adjective) : easy to understand and not causing any confusion

Correct Option: D

obscure (Adjective) : not well–known; unknown
evident (Adjective) : easily seen; obvious; clear
definite (Adjective) : sure; certain; unlikely to change; clear
careless (Adjective) : not being careful
clear (Adjective) : easy to understand and not causing any confusion

Refer to explanation

Correct Option: A

Exquisite means extremely beautiful and delicate. For example
The queen was wearing an exquisite diamond
Sachin played an exquisite cover drive in the last over
The band gave an exquisite performance last night

The opposite of exquisite is crude which means constructed in a rudimentary or makeshift way. For example
His performance was crude and lacked beauty
He is not liked in the social circle because of his crude nature

Other options meaning
Subdued means restrained. For example
Young man surprised him with his subdued reaction

Devastating means highly destructive or damaging
The devastating earthquake in Nepal led to huge loss of life
The devastating inning of Sachin led to India's famous victory
The news was devastating to all of us

Devoid means entirely lacking or free from
He is completely devoid of emotions
The planet was devoid of any life form
His life is devoid of any form of happiness

Refer to explanation

Correct Option: B

Feasible means possible and practical to do easily or conveniently
The plan looked feasible in theory but it completely failed on implementation
The scientists are looking for the most feasible scenario

The opposite of feasible is impossible
It is impossible to recreate life in laboratory

Meaning of other words in the option
Pragmatic means dealing with things sensibly and realistically in a way that is based on practical rather than theoretical considerations
The Kashmir issue can only be solved through pragmatic approach
His pragmatic behavior earned him many success in his business

Drastic means likely to have a strong or far-reaching effect; radical and extreme
With economy in doldrums, the government was forced to take drastic steps to prop up economy

Narrow is a synonym of insular.

Correct Option: D

Narrow is a synonym of insular.

Extant is an adjective meaning existing.

Correct Option: A

Extant is an adjective meaning existing.