contagious (Adj.) : easily spread from one person to another (disease)
infectious (Adj.) : easily spread ; caused by infection
epidemic (N.) : a large number of cases of a particular disease happening at the same time in a particular community
endemic (Adj.) : regularly found in a particular place or among a particular group of people and difficult to get rid of.

Correct Option: A

contagious (Adj.) : easily spread from one person to another (disease)
infectious (Adj.) : easily spread ; caused by infection
epidemic (N.) : a large number of cases of a particular disease happening at the same time in a particular community
endemic (Adj.) : regularly found in a particular place or among a particular group of people and difficult to get rid of.

tsunami (N.) : an extremely large wave in the sea caused by an earthquake ; tidal wave
tornado (N.) : a violent storm with very strong winds which move in a circle
hurricane (N.) : a violent storm with very strong winds, especially in the western Atlantic Ocean
cyclone (N.) : A violent tropical storm in which strong winds move in a circle

Correct Option: A

tsunami (N.) : an extremely large wave in the sea caused by an earthquake ; tidal wave
tornado (N.) : a violent storm with very strong winds which move in a circle
hurricane (N.) : a violent storm with very strong winds, especially in the western Atlantic Ocean
cyclone (N.) : A violent tropical storm in which strong winds move in a circle

inaudible (Adj.) : that you cannot hear
unheard (Adj.) : that no body pays attention to
faint (Adj.) : that cannot be clearly seen, heard/ smelt
audible (Adj.) : that can be heard clearly

Correct Option: D

inaudible (Adj.) : that you cannot hear
unheard (Adj.) : that no body pays attention to
faint (Adj.) : that cannot be clearly seen, heard/ smelt
audible (Adj.) : that can be heard clearly

anarchy (N.) : a situation in a country, an organisation, etc. in which there is no government, order or control rebellion (N.) : an attempt by some of the people in a country to charge their government using violence
mutiny (N.) : the act of refusing to obey the orders of somebody in authority, especially by soldiers/ sailors
revolt (N.) : a protest against authority

Correct Option: D

anarchy (N.) : a situation in a country, an organisation, etc. in which there is no government, order or control rebellion (N.) : an attempt by some of the people in a country to charge their government using violence
mutiny (N.) : the act of refusing to obey the orders of somebody in authority, especially by soldiers/ sailors
revolt (N.) : a protest against authority

intermediary (Adj.) : mediator ; a person/ organisation that helps other people/ organisation to make an agreement by being a means of communication between them
neutral (Adj.) : Impartial ; unbiased
judge (Adj.) : a person who decides who has won a competition
connoisseur (N.) : an expert on matters involving the judgement of beauty, quality or skill in art, food/music

Correct Option: B

intermediary (Adj.) : mediator ; a person/ organisation that helps other people/ organisation to make an agreement by being a means of communication between them
neutral (Adj.) : Impartial ; unbiased
judge (Adj.) : a person who decides who has won a competition
connoisseur (N.) : an expert on matters involving the judgement of beauty, quality or skill in art, food/music