Which of the following is one of the basic characteristics of DRAMs?

[A].	DRAMs must have a constantly changing input.
[B].	DRAMs must be periodically refreshed in order to be able to retain data.
[C].	DRAMs have a broader "dynamic" storage range than other types of memories.
[D].	DRAMs are simpler devices than other types of memories.

Answer: Option B

Explanation:

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