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Option 3 : Argon
- Melting points of: Titanium = 1, 668 °C, Sulphur = 112.8 °C, Argon =( - 189.4 °C) and Zinc = 419.5 °C.
- Therefore, the lowest melting point is of argon.
- Argon is the only gas given among options and gases usually have low melting points.
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