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DVD rd could stand for DVD+R DL (DL stands for Double Layer) also called DVD+R9, is a derivative of the DVD+R format created by the DVD+RW Alliance. Its use was first demonstrated in October2003. DVD+R DL discs employ two recordable dye layers, each capable of storing nearly the4.7 GB capacity of a single-layer disc, almost doubling the total disc capacity to8.5 GB. Discs can be read in many DVD devices (older units are less compatible) and can only be created using DVD+R DL and Super Multi drives. DL drives started appearing on the market during mid-2004, at prices comparable to those of existing single-layer drives. As of March2011 DL media is up to twice as expensive as single-layer media. The latest DL drives write double layer discs at a slower rate (up to12×) than current single-layer discs (up to24×).
So the answer is4 4. DVD-RAM.
Answer number four : DVD-RAM
never heard of DVD-RD, so the answer should be option1
which of these is not a type of dvd drive, the answer is no4
