How can you add a comment in a JavaScript?{$a->questionintifier} Yanıta.//This is a comment//b.//This is a commentc."This is a comment"d.<!--This is a comment-->

In JavaScript, you can add a comment in two ways:

1. Single Line Comment: You can add a single line comment by using two forward slashes (//). Anything after these slashes on the same line will be considered a comment. For example:

// This is a comment

2. Multi-line Comment: You can add a multi-line comment by using a forward slash and an asterisk (/) at the beginning of the comment, and an asterisk and a forward slash (/) at the end of the comment. Anything between these symbols will be considered a comment. For example:

/* This is a
multi-line comment */

So, the correct answer to your question is:

a. //This is a comment

Please note that the other options you provided are not valid ways to add comments in JavaScript.