What is the diameter of a Blu-ray Disc?

Correct option is D

· 120 mm: The standard diameter for a Blu-ray Disc is 120 mm, which is the same size as CDs and DVDs. This size allows for high-capacity storage on the disc, with Blu-ray Discs holding much more data than DVDs due to their advanced data encoding technology.
· 115 mm: This is not a standard size for optical discs.
· 100 mm: A 100 mm diameter is smaller than standard optical discs and is typically used for mini discs, not full-sized Blu-ray Discs.
· 110 mm: This is not a standard size for optical discs.