statedelaware december 7 1787 statepennsylvania 12 statenew jersey 18 keys arraykeys..., PHP Arrays, PHP

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Question:$state["Delaware"] = "December 7, 1787";
$state["Pennsylvania"] = "December 12, 1787";
$state["New Jersey"] = "December 18, 1787";
$keys = array_keys($state);
print_r($keys);

What will be the output?

A Array ( [0] => Delaware [1] => Pennsylvania [2] => New Jersey ) 
B Array ( “Delaware”,” Pennsylvania” ,”New Jersey” ) 
C array ( [0] => Delaware [1] => Pennsylvania [2] => New Jersey ) 
D Array ( [0] => Delaware ,[1] => Pennsylvania ,[2] => New Jersey )

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Question:$state["Delaware"] = "December 7, 1787"; $state["Pennsylvania"] = "December 12, 1787"; $state["New Jersey"] = "December 18, 1787"; $keys = array_keys($state); print_r($keys); What will be the output?

A Array ( [0] => Delaware [1] => Pennsylvania [2] => New Jersey )

B Array ( “Delaware”,” Pennsylvania” ,”New Jersey” )

C array ( [0] => Delaware [1] => Pennsylvania [2] => New Jersey )

D Array ( [0] => Delaware ,[1] => Pennsylvania ,[2] => New Jersey )

A