General Knowledge · Inventions and Discoveries
दृष्टिबाधित लोगों के लिए ब्रेल लिपि का आविष्कार किसने किया था?
- 1लुई ब्रेल✓
- 2आइंस्टीन न्यूटन
- 3नील्स बोर
- 4हेलेन केलर
सही उत्तर देखें
लुई ब्रेल
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