What will be the output of the following PHP code ?$age = array("Harry" => "21",

"21", "Ron" => "23","Malfoy" => "21");array_change_key_case($age, CASE_UPPE"> "21","> What will be the output of the following PHP code ?$age = array("Harry" => "21", "21","> "21", "Ron" => "23","Malfoy" => "21");array_change_key_case($age, CASE_UPPE"> "21"," /> "21", "Ron" => "23","Malfoy" => "21");array_change_key_case($age, CASE_UPPE" /> "21", "Ron" => "23","Malfoy" => "21");array_change_key_case($age, CASE_UPPE" />

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What will be the output of the following PHP code ?$age = array("Harry" => "21", "Ron" => "23","Malfoy" => "21");array_change_key_case($age, CASE_UPPER);array_pop($age);print_r($age);

Options:

A . Array ( [HARRY] => 21 [RON] => 23 [MALFOY] => 21 )

B . Array ( [Harry] => 21 [Ron] => 23 [Malfoy] => 21 )

C . Array ( [Harry] => 21 [Ron] => 23 )

D . Array ( [HARRY] => 21 [RON] => 23 )

Answer: Option D

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