grades array 42 98 100 43 12 sort printr what will, PHP Arrays, PHP

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Question:$grades = array(42, 98, 100, 100, 43, 12);
sort($grades);
print_r($grades); 

What will be the output?

A Array ( [0] => 100 [1] => 100 [2] => 98 [3] => 43 [4] => 42 [5] => 12 ) 
B Array ( [0] => 12 [1] => 42 [2] => 43 [3] => 98 [4] => 100 [5] => 100 ) 
C Array ( [12] => 0 [42] => 1 [43] => 2 [98] => 3 [100] => 4 [100] => 5 ) 
D Array ( [3] => 98 [4] => 100 [5] => 100 [0] => 12 [1] => 42 [2] => 43 )

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Question:$grades = array(42, 98, 100, 100, 43, 12); sort($grades); print_r($grades); What will be the output?

A Array ( [0] => 100 [1] => 100 [2] => 98 [3] => 43 [4] => 42 [5] => 12 )

B Array ( [0] => 12 [1] => 42 [2] => 43 [3] => 98 [4] => 100 [5] => 100 )

C Array ( [12] => 0 [42] => 1 [43] => 2 [98] => 3 [100] => 4 [100] => 5 )

D Array ( [3] => 98 [4] => 100 [5] => 100 [0] => 12 [1] => 42 [2] => 43 )

B