availed myself of will replace availed.
avail oneself of (Idiom) : take advantage of
Look at the examples given below :
We availed ourselves of his goodwill.
Guests availed themselves of the full range of hotel facilities.
Hence, that I availed myself of is the right usage

Correct Option: B

availed myself of will replace availed.
avail oneself of (Idiom) : take advantage of
Look at the examples given below :
We availed ourselves of his goodwill.
Guests availed themselves of the full range of hotel facilities.
Hence, that I availed myself of is the right usage

sick of life will replace sick with life.
sick of (something) : being bored with/annoyed about something
Look at the examples given below :
I’m sick of the way you’ve treated me.
We’re sick of waiting around like this.

Correct Option: C

sick of life will replace sick with life.
sick of (something) : being bored with/annoyed about something
Look at the examples given below :
I’m sick of the way you’ve treated me.
We’re sick of waiting around like this.

Use of the is incorrect because –
the (Def. Art.) will not be used with the names of field of study.
Hence, to win Nobel Prize for Literature is the right usage.

Correct Option: B

Use of the is incorrect because –
the (Def. Art.) will not be used with the names of field of study.
Hence, to win Nobel Prize for Literature is the right usage.

to care for/to take care of will replace to care because –
to care for/to take care of (Phr.V.) : to look after somebody
And. moreover, a Preposition is used at the end of a Phrasal Verb
Look at the examples given below :
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Correct Option: C

to care for/to take care of will replace to care because –
to care for/to take care of (Phr.V.) : to look after somebody
And. moreover, a Preposition is used at the end of a Phrasal Verb
Look at the examples given below :
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making will replace doing because –
make a mistake is the right usage.
Look at the examples given below :
Don’t worry; we all make mistakes.
I made the mistake of giving him my address.
Hence, always making is the right usage

Correct Option: B

making will replace doing because –
make a mistake is the right usage.
Look at the examples given below :
Don’t worry; we all make mistakes.
I made the mistake of giving him my address.
Hence, always making is the right usage