Which of the following is the correct nucleotide pair

Give a single word that substitutes for the following expression:

The study of the origin and history of words

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

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

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

The study of earthquakes

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

1.       Churlish

2.       Dash

3.       Retain

4.       Chivalrous

Impeccable

Select the most appropriate option to substitute the bold segment in the given sentence.