It seems like the answer options are missing from your query. According to historical research, the oldest known invention is the stone tool, specifically the hand axe, which dates back roughly 2.6 million years. .
Which of the following inventions is the oldest?
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This question is part of 📚 General Knowledge within the broader 🌐 Current Affairs & GK subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.