ঘনকোণ (Solid angle)-এর SI একক কোনটি?

A রেডিয়ান (radian)

B ডিগ্রি (degree)

C ক্যান্ডেলা (candela)

D স্টেরেডিয়ান (steradian)

Correct Answer & Explanation

Option D

Option D is the correct answer according to official curriculum guidelines.

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