Select the most appropriate antonym of the given word.
Pertinent
(a)Indifferent
(b)Appropriate
(c)Determined
(d)Irrelevant

Hint: We need to find the antonym of the word pertinent. Read the question and try to understand the context, it will give you an idea about the meaning of the given word. Now go through the options and recall their meaning. The one opposite to the meaning of pertinent is the answer.

Complete answer: An antonym or an opposite refers to a word that is contrary in meaning to another word. For example- Perfect is an antonym for imperfect.
‘Pertinent’ refers to something relevant or ‘to the point’. The word ‘pertinent’ has been derived from the Latin word- Pertinere.
We know the meaning and the origin of the word ‘pertinent’. Now, let’s look at its usage:
For example- The manager asked me to enter all the pertinent details on my data page. Here, we can conclude that a manager, X, asked Y to fill in all the relevant and necessary details on his data page.
Let’s examine the meaning of the given options-
Option a- ‘Indifferent’ refers to the quality of being impassive or dispassionate about something. ‘Indifferent’ is different in meaning to the given context. Hence, it is an incorrect option.
Option b- ‘Appropriate’ refers to something suitable or proper. ‘Appropriate’ is similar in meaning to the given context. Hence, it is an incorrect option.
Option c- ‘Determined’ refers to the quality of being resolute and adamant. ‘Determined’ is different in meaning to the given context. Hence, it is an incorrect option.
Option d- ‘Irrelevant’ refers to something unrelated or beside the point. ‘Irrelevant’ is opposite in meaning to the given context. Hence, it is the correct option.
The correct answer is Option ‘d’.

Note: Some other antonyms for ‘pertinent’ are; improper, inapplicable, inappropriate, etc while some synonyms for ‘pertinent’ are; applicable, appropriate, germane, etc.