নিচের কোনটি অপটিক্যাল ডিভাইস-এর উদাহরণ?
A. হার্ড ডিস্ক (Heard disk)
B. র্যাম (RAM)
C. সি পি ইউ (CPU)
D. সিডি ড্রাইভ (CD Drive)
সঠিক উত্তরঃ
D.
সিডি ড্রাইভ (CD Drive)
Explanation:
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