Fill in the Blanks

'At' is used for specific places; 'in' is used or bigger places.

Here we need a preposition. So, options 1 & 4 are eliminated. Moreover, double usage of 'negative' is incorrect. Hence, option 3 also eliminated. Thus, option 2.

Book is a non-living noun, and for referring to a non-living noun we use pronoun 'which'.

Pronoun 'which' is used for non-living things, and pronoun 'what' is used for abstract nouns. For living nouns (in subjective form) we use pronoun 'who'.

Kind of books refer to nature of the books. Nature of something is an abstract noun, and for referring to abstract nouns we use pronoun 'what'.

The matter here is abstract, and for referring to abstract nouns we use pronoun 'what'.

Here the reciever of award is the subject, and for living subjects we use pronoun 'who'.

Here the top scorer of the innings is the subject (i.e. doer of the verb). So, pronoun 'who' should be used.

Whenever we start a sentence in reference to more than one person, we use pronoun 'which' (in fact of being the case of living nouns).

Whenever we ask for somebody's preference between/among some articles, we use pronoun 'what'.

One's opinion is abstract and for reffering to abstract nouns we use 'what' as pronoun.

For the living nouns (in objective cases) we use pronoun 'whom'.

The sentence does not clarify the thing they fought for, so we should use the pronoun 'what'. 'Who' is used for subject and 'whom' represents possession. We use 'which' for things. So, these options are not correct.

For non-living nouns we use pronoun 'which'. Books are non-living things.

For living nouns (in subjective cases) we use 'who'. As the visiter is the doer of the action, thus 'who'.