മിനുസപ്പെടുത്തിയ ശിലായുധങ്ങൾ ഉപയോഗിക്കാൻ തുടങ്ങിയ കാലഘട്ടം അറിയപ്പെടുന്നത് ?
Aവെങ്കലയുഗം
Bമധ്യശിലായുഗം
Cനവീനശിലായുഗം
Dതാമ്രശിലായുഗം
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