Which one of following is not a class of project?
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Indirect
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Contract
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Infrastructure
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Capital
The question asks which option is NOT a class of project. In project classification systems, the standard classes are Indirect, Contract, and Capital projects. Infrastructure is not a standard project class in this categorization scheme.
In common project/cost classification schemes (as used in project accounting), projects are typically categorized as Capital, Contract, or Indirect (overhead/expense) — these describe how a project is funded and accounted for. "Infrastructure" describes a type of deliverable or asset, not a project accounting class in this scheme, so it's the one that doesn't belong. This is a somewhat niche/organization-specific classification question, so the exact taxonomy may vary by source, but among the given options Infrastructure is the outlier.