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1. LASER - এর পূর্রেূপ কী?
- A. Light Amplification by the Solid Emision of Raduation
- B. Light Amplification by the Solid Emision of Raduation
- C. Light Amplification by the Solid Emision of Raduation
- D. Light Amplification by the Solid Emision of Raduation
Answer: Option C
Explanation:
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