2ndLevel, option c is not a valid Java identifier.
<h3 /><h3> What are Java identifiers ?</h3>
In Java, an identifier is a group of one or more characters that is used to name variables, methods, classes, etc. There are requirements that must be followed in order to produce an identification. Additionally, because they have a fixed meaning in Java, some character sequences, such as keywords, reserved words, and literals, cannot be used as identifiers.
<h3>In Java, can keywords be used as identifiers?</h3>
Since these words are part of the grammar of the Java programming language, you cannot use them as variable names (or identifiers) for variables like int, for, class, etc. Here is a list of every single keyword used in Java programming. You are not permitted to use the IDs true, false, or null in addition to these terms. Due to the fact that they are literals.
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