As we know that ,
Relation - different kinds of writing forms; stanza and chapter are also different kinds of styles of composition different from each other.

Correct Option: A

As we know that ,
Relation - different kinds of writing forms; stanza and chapter are also different kinds of styles of composition different from each other, clause is a part of a sentence and some art can be fiction.
Therefore , POETRY : PROSE :: STANZA : CHAPTER is correct answer .

According to question , we know that
Preamble is opening/introduction and statute a written law. Similarly, prologue is an introduction to a play or a poem, etc.

Correct Option: A

According to question , we know that
Preamble is opening/introduction and statute a written law. Similarly, prologue is an introduction to a play or a poem, etc.
Therefore , PREAMBLE : STATUTE :: PROLOGUE : NOVEL is correct answer .

As we know that ,
Libertine is a person (man) who leads an immoral life. Similarly an altruist is a person who leads a selfless life.

Correct Option: C

As we know that ,
Libertine is a person (man) who leads an immoral life. Similarly an altruist is a person who leads a selfless life.
Therefore , LIBERTINE : IMMORALITY :: ALTRUIST : SELFLESSNESS is required answer .

As we know that ,
A key is used to start the ignition. Similarly a switch is used to start the light.

Correct Option: C

As we know that ,
A key is used to start the ignition. Similarly a switch is used to start the light.
Therefore , KEY : IGNITION :: SWITCH : LIGHT is required answer .

As per the given question , we get
Mitigate means to lessen something, say punishment in this case. Similarly alleviate means to lessen something, say pain in this case.

Correct Option: D

As per the given question , we get
Mitigate means to lessen something, say punishment in this case. Similarly alleviate means to lessen something, say pain in this case.
Thus , MITIGATE : PUNISHMENT :: ALLEVIATE : PAIN is required answer .