Questions

Alcohol impairs your judgement. Judgement is in your brain stupid and it impairs your brain. 

Humans cannot digest cellulose because they are lacking with the enzymes responsible to breakdown the beta acetal linkages.

Honesty

The meanings of the given words are as follows:
Tremulous: shaking or quivering slightly 

Stringent: (of regulations, requirements, or conditions) strict, precise, and exacting

Garrulous: excessively talkative, especially on trivial matters
Quivery: shaking or trembling slightly
Steady: firmly fixed, supported, or balanced; not shaking or moving
Conjunctive: relating to or forming a connection or combination of things
Desist: stop doing something; cease or abstain

Abstain: restrain oneself from doing or enjoying something
Defer: put off (an action or event) to a later time; postpone
Terse: sparing in the use of words; abrupt
Abrupt: sudden and unexpected
Therefore, it can be observed that option B i.e. ‘quivery, steady’ forms a synonym-antonym pair of ‘tremulous’.

Qatar to withdraw from OPEC as of Jan 2019. OPEC, The Organization of the Petroleum Exporting Countries is an intergovernmental organisation of 14 nations, founded in 1960 in Baghdad, Iraq.

Its members are Qatar, Saudi Arabia, Iran, Iraq, Indonesia, Venezuela, Nigeria, Libya, United Arab Emirates, Algeria, Kuwait, Ecuador, Angola, Gabon.