Concept:The correct sequence of jumbled sentence parts is PSQR.Explanation:The sentence begins with "the essence of human resource development is", which must be followed by part P: "remedial role in".Next, part S: "education which plays a significant and" logically continues the explanation.Finally, part QR: "balancing the socio‑economic fabric of the country" completes the meaning.Thus, the correct order is P → S → Q → R, i.e., PSQR.Answer:Option A (PSQR).