Research octane number refers to the

Solution (By Examveda Team)

In petroleum refinery engineering, the research octane number (RON) refers to high octane number motor fuels (Option B).

The research octane number (RON) is a measure of the anti-knock properties of motor fuels. Higher RON values indicate better resistance to knocking or detonation in spark-ignition engines. Fuels with high RON values are desirable for use in high-performance engines or engines with high compression ratios, as they help prevent knocking and improve engine efficiency.

Therefore, the correct option is Option B: High octane number motor fuels.