Environment & Ecology · Environment
निम्नलिखित में से कौन सा रेडियोधर्मिता (radioactivity) का प्राकृतिक स्रोत नहीं है?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1मेडिकल एक्स-रे मशीनें✓
- 2पृथ्वी की पपड़ी (crust) से उत्सर्जन
- 3समुद्री तलछट
- 4कॉस्मिक किरणें
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मेडिकल एक्स-रे मशीनें
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