5378. According to an engineer P : might hit the market next year Q : a newly developed air-cooler system R : that employed in conventional room coolers S : which is based on a principle radically different from The proper sequence should be: September 16, 2025 by Admin A. PQRS B. QSRP C. RSQP D. SQRP ✅ The correct answer is option B.
