The word Tranquility (Noun) means : peace, serenity.

Correct Option: A

The word Tranquility (Noun) means: peace, serenity.
Disturbance = a situation in which people behave violently in a public place.

Harmless (Adjective) = (not likely to cause harm ; innocuous)
Lethal (Adjective) = (able to cause death ; extremely dangerous) Look at the sentences : Three minutes after the fire started, the house was full of lethal fumes. He might look a bit fierce, but actually he is fairly harmless.

Correct Option: B

Harmless (Adjective) = (not likely to cause harm ; innocuous)
Lethal (Adjective) = (able to cause death ; extremely dangerous) Look at the sentences : Three minutes after the fire started, the house was full of lethal fumes. He might look a bit fierce, but actually he is fairly harmless.

Daring (Adjective) = adventurous; audacious; bold ; brave and taking risks.
Cautious (Adjective) = careful to avoid risks. Look at the sentence : He is a cautious driver. This is a daring new film = (one willing to risk criticism) by one of our most original modern directors.

Correct Option: A

Daring (Adjective) = adventurous; audacious; bold ; brave and taking risks.
Cautious (Adjective) = careful to avoid risks. Look at the sentence : He is a cautious driver. This is a daring new film = (one willing to risk criticism) by one of our most original modern directors.

Earnest (Adjective) = showing sincere and intense conviction; serious and determined.
Flippant (Adjective) = not showing a serious or respectful attitude ; frivolous ; thoughtless Look at the sentences : Gandhi was a very earnest fighter. My flippant response earned me an angry glance from my instructor.

Correct Option: A

Earnest (Adjective) = showing sincere and intense conviction; serious and determined.
Flippant (Adjective) = not showing a serious or respectful attitude ; frivolous ; thoughtless Look at the sentences : Gandhi was a very earnest fighter. My flippant response earned me an angry glance from my instructor.

Superficial (Adjective) = existing or occurring at or on the surface; exterior; peripheral; slight; not serious
Profound (Adjective) = very great or intense; keen; sincere; having or showing great knowledge or insight; deep Look at the sentence : His mother's death when he was aged six had a very profound effect on him. He's fun to be with, but he's very superficial.

Correct Option: D

Superficial (Adjective) = existing or occurring at or on the surface; exterior; peripheral; slight; not serious
Profound (Adjective) = very great or intense; keen; sincere; having or showing great knowledge or insight; deep Look at the sentence : His mother's death when he was aged six had a very profound effect on him. He's fun to be with, but he's very superficial.