• refute (Verb) : to prove that something is wrong
• rebuke (Verb) : to speak in an angry and critical way
• revoke (Verb) : to cancel something officially so that it may no longer be valid. Here, refute is the right usage.

Only one of the boys (Subject) is Singular. It will agree with a Singular Verb. So, has will be used

Here, has is the right usage.

The sentence is in Indirect Speech showing Past time. So, Past Perfect Tense wi ll be used .

Here, had escaped is the right usage.

• bring out (Phr.V.) : to lay stress; to make something clear
• bring about (Phr. V.) : to cause to take place
• bring in (Phr.V.) : introduce ; include
• bring forth (Phr.V.) : to give birth to; to bear (fruit)

Here, bring out is the right usage.

In a positive statement , the question tag is negative. The sentence is in Simple Future Tense

Here, won’t it is the right usage

yours (Pronoun) : It is the second person Possessive Pronoun replacing your + Noun .

Here, yours is the right usage.

The sentence is in Subjunctive Mood beginning with the if-clause. The Verb will be in Past Tense and Plural

Here, were is the right usage.

The structure of the sentence is as follows :

the + comparative + the + comparative

Here, the higher is the right usage

one another (Pro.) : used when you are saying that each member of a group does something to or for the other people in the group

one another and each other are Reciprocal Pronouns .

• Bob and Tom were quarrelling with each other.
• The three winners congratulated one another.

Here, one another is the right usage.

• go down (Phr. V.) : to fall to the ground; to become lower; to be written in something ; to be recorded or remembered in something
• go by (Phr. V.) : (of time) to pass; to be guided by something; to form an opinion from something
• go on (Phr. V.) : (of time) to pass; continues without changing; continue speaking, often a short pause
• go through (Phr. V.) : to look at or examine something carefully; to experience or suffer something

Here, go down is the right usage.

are to be ranked is the right usage.

The sentence is in Passive Voice

Since is followed by a Verb in the Past Tense

Here, came is the right usage.

• expelled (Verb) : forced to leave an organisation
• rejected (Verb) : refused to accept (an application for a job)
• evicted (Verb) : put out (a tenant) from a property by legal process

Here, expelled is the right usage.

As the Subject ( Ram ) is Singular, the Verb will also be in Singular along with (Phr.v.) : together with someone It modifies the earlier word ( Ram ) which is Singular

Here, was watching is the right usage.

• elicit (Verb) : to get information or reaction from somebody
• provoke (Verb) : to cause a particular reaction or have a particular effect
• command (Verb) : order
• infer (Verb) : to reach an opinion or decide that something is true on the basis of information that is available

Here, elicit is the right usage.

• took out (Phr. V.) : obtained an official document or service
• took up (Phr. V.) : picked up, began to occupy, gathered from a number of sources
• took in (Phr. V.) : allowed somebody to stay in your home
• took over (Phr. V.) : replaced something

Here, took out is the right usage.