If the encoding value is known, once can insert the corresponding character directly into a web page using the character encoding reference
1. code;
2. & char;
3.  
4. ©

Option A i.e., &#code; is the correct option.

Explanation:

The following option is true because the following code is the HTML character set that is used for the encoding of the character reference into the web page. This character set is the encoding value that is inserted for the corresponding character set into the web page without changing their path.  It is also used to add special characters in the HTML scripting language.

the difference is right there dont you see it