_____ has the highest melting point among metals.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Tungsten
Tungsten melts at about 3422°C, the highest melting point of any metal. That is why it was used for the filaments of electric bulbs, which glow white-hot without melting, and for welding electrodes.
Why the other options are incorrect
Option (1) Bromine — Incorrect. Bromine is a non-metal, and a liquid at room temperature.
Option (2) Mercury — Incorrect. Mercury has the lowest melting point among metals (about −39°C); it is a liquid at room temperature.
Option (4) Carbon — Incorrect. Carbon (as graphite or diamond) withstands even higher temperatures than tungsten, but it is a non-metal, and the question asks about metals.