What is level 2 in DFD means?

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Question:What is level 2 in DFD means?

1.Highest abstraction level DFD is known as Level 2.

2.Level 2 DFD depicts basic modules in the system and flow of data among various modules.

3.Level 2 DFD shows how data flows inside the modules mentioned in Level 1.

4.All of the above

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  1. What is level 2 in DFD means?
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