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Question:Which of the following is correct way to use curly brace in the string?

A $capicals=array("bangladesh"=>"Dhaka");
echo "This capital of Bangladesh is {$capitals["bangladesh"]}"; 
B $capicals=array("bangladesh"=>"Dhaka");
echo "This capital of Bangladesh is {{$capitals["bangladesh"]}}"; 
C $capicals=array("bangladesh"=>"Dhaka");
echo "This capital of Bangladesh is {$capitals['bangladesh']}"; 
D $capicals=array("bangladesh"=>"Dhaka");
echo "This capital of Bangladesh is {$capitals[bangladesh]}";

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Question:Which of the following is correct way to use curly brace in the string?

A $capicals=array("bangladesh"=>"Dhaka"); echo "This capital of Bangladesh is {$capitals["bangladesh"]}";

B $capicals=array("bangladesh"=>"Dhaka"); echo "This capital of Bangladesh is {{$capitals["bangladesh"]}}";

C $capicals=array("bangladesh"=>"Dhaka"); echo "This capital of Bangladesh is {$capitals['bangladesh']}";

D $capicals=array("bangladesh"=>"Dhaka"); echo "This capital of Bangladesh is {$capitals[bangladesh]}";

C