The correct answer is D. PQRS.
The sentence is “Education is the first need for the development of a citizen of the proper sense of responsibilities.”
The word “education” is the subject of the sentence. The word “first” is an adjective modifying the noun “need.” The word “need” is the object of the preposition “for.” The word “development” is the object of the preposition “of.” The word “citizen” is the object of the preposition “in.” The word “proper” is an adjective modifying the noun “sense.” The word “sense” is the object of the preposition “of.” The word “responsibilities” is the object of the preposition “of.”
The correct sequence of the words is PQRS.