Who was the first person who referred Agra by its modern

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

Select the most appropriate option to substitute the highlighted segment. If no substitution is required select 'No substitution'.

Even though G-20 countries had disagree on some issues, they ended their summit on a amicable note. 

In each of the following questions, choose the correct alternative which can be substituted for the below given word/ phrase of words.

Select the option that can be used as a one-word-substitute for the given group of words.

A person who studies insects:            

making marks that cannot be removed.

 Among the given alternatives, find the word which can be the best substitute for the given sentence.

Adept

Apex

A. Their four-hour match on Centre Court was an apex .

B. Tinted photographs were an apex substitute for colour.

Choose an option, which can be substituted for a given word/sentence/phrase out of given options.