What symbol is used for multi-line comments in Python?

• A. /* ... */
• B. """ ... """
• C. // ...
• D. # ...

Answer: (B)

In Python, the symbol used for multi-line comments is represented by triple quotes, either single (''' ... ''') or double (""" ... """). This allows a developer to comment out multiple lines of code or text at once. When enclosed in these triple quotes, Python treats everything inside as a string, and since the string is not assigned to a variable or used, it effectively acts as a comment.

The use of triple quotes for multi-line comments is especially useful for documentation purposes, allowing the inclusion of verbose explanations directly in the code without affecting its execution. This contrasts with the use of a single hash symbol (#), which only allows for single-line comments.

Single-line comments are prefixed with #, and while this is great for brief notes, triple quotes make it easier to write longer explanations that span several lines. Hence, the correct choice highlights this essential feature of Python's syntax that allows for clear and extended documentation within the code itself.