Which of the following statements with comments is(are) valid?

To determine which statements with comments are valid, it's essential to understand the rules for writing comments in programming languages, particularly in the context of a language typically used in an introductory programming course, such as Python or Java.

If option II and III are valid, it implies that these statements follow the correct syntax for comments. In many programming languages, comments can be written using two common forms: single-line comments using a specific character (like # in Python or // in Java) and multi-line comments encapsulated within specific delimiters (like /* ... */ in Java).

Validity of both II and III suggests that they adhere to the respective conventions for comments in the programming language being discussed. A statement that includes a proper single-line comment or a correctly structured multi-line comment would support the correctness of II and III. This is crucial because a valid comment must not interfere with the program's executable code and must be syntactically accurate according to the language's specifications.

In contrast, if options I and/or IV were invalid, it could be due to improper syntax or use of comment conventions that do not conform to the established rules. Misplaced comment characters or incorrect comment block structures in those options could lead to their invalidation.

Thus,