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I guess it should be Code Reviews.Below is explanation
As for as "Unreachable code is concerned,whcih the basic aim of
Review, and it is achieved by Code Reviews.
In case Reviews, code is reviewed to find,
c.Declared but unused variables and
d. Used but not deleted variables.
hope it will give enough idea,
@ Mohan, so according to you correct answer is option E. Can you provide some explanation or reference to your answer so it will be easy for us to understand.
The answer is E.plz read the following topic
Types of Errors Static Analysis Tools Discover: