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Something simple ig ? Part- idk

B
<pre><code class="language-python">list_2 = list_1
</code></pre>
This code produces a new reference to the object pointed to list_1, so list_1 and list_2 are references to the same object.
list_2 would be a new object if line 2 was something like this:
<pre><code class="language-python">list_2 = list_1[:]
</code></pre>
Now the result is [9, 2, 3] [1, 2, 3, 4]

Can anybody tell me about the best free recourse to learn python with professional certificates?

List 2 is a ref to list 1, all changes to list 2 affect list 1. Answer is B.