Although it does contain some path breaking ideas, one would hardly characterize the work as .
From the words given below, choose the pair of words that, when filled in the blank (used interchangeably), would not alter the meaning of the sentence.
This question checks whether we can spot two words from a list that mean nearly the same thing, so that using either one in the blank leaves the sentence saying the same thing. The sentence tells us the work has some path breaking ideas, but as a whole it would "hardly" be called a certain quality.
Only "original" and "innovative" are true synonyms in this context, so either word fits the blank while keeping the same overall claim about the work.
Let's summarize:
The correct answer is option (c), II and V.