Question

Find the pair of words that has the same kind of relationship as the numbered pair.

Answer 1

Like adjunct and addition, both are defined as 'to add', so they are synonyms.
In the choices, the best answer would be c. straits : hardship.

Abstentions is to abstinate, absence is not being present
Commodiousness is having a lot of space, size is a fixed proportion
Conjugation is verb changes, nouns are simply names

Straits is something that causes distress, hardship are challenged