Which one of the following can be used to instantiate an object in PHP assuming class name to be Foo?

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Question:Which one of the following can be used to instantiate an object in PHP assuming class name to be Foo?

1. $obj = new $foo;

2.$obj = new foo;

3. $obj = new foo ();

4.obj = new foo ();

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  1. Which one of the following can be used to instantiate an object in PHP assuming class name to be Foo?
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