Direct metal laser sintering (DMLS) is practically the same as SLS but uses metal powder.

• A. Selective Laser Sintering (SLS)
• B. Stereolithography (SLA)
• C. Direct metal laser sintering (DMLS)
• D. Fusion deposition modelling (FDM)

Answer: (C)

Direct metal laser sintering is the metal-powder version of the laser sintering idea. The same basic approach is used—build parts layer by layer by selectively fusing powder with a laser—but the material is metal instead of plastic. This gives metal parts with different mechanical properties and typically requires post-processing like heat treatment. The other options describe different processes: Selective Laser Sintering uses polymer powders, stereolithography uses a liquid resin cured by light, and fused deposition modelling extrudes thermoplastic filament rather than sintering powder with a laser. So the description matches Direct metal laser sintering.