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

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

Which of the following is/are correct output for above Statement ?

A Array ( [0] => Delaware [1] => Pennsylvania [2] => New Jersey ) 
B Array ( [1] => Delaware [2] => Pennsylvania [3] => New Jersey ) 
C array_keys($state); ["Delaware"] = "December 7, 1787"; 
D $state["Delaware"] = "December 7, 1787";

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Question:$state["Delaware"]="December 7, 1787"; $state["Pennsylvania"]="December 12, 1787"; $state["New Jersay"]="December 18,1787"; $keys=array_keys($state); print_r($keys); Which of the following is/are correct output for above Statement ?

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

B Array ( [1] => Delaware [2] => Pennsylvania [3] => New Jersey )

C array_keys($state); ["Delaware"] = "December 7, 1787";

D $state["Delaware"] = "December 7, 1787";

A