What is the difference between $$ and $!?

Question

$$ gives the process id of the currently executing process whereas $! Shows the process id of the process that recently went into the background.
$$ Shows the process id of the process that recently went into the background whereas $! gives the process id of the currently executing process .
$$ Show the count of process id whereas $! gives count of background process id
None of these

Solutons With Key Points

Answer- A

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