Suppose you want to write test cases to test if variable names are valid for a given programming language that has following rules

Variable names must start with an uppercase letter.

Variable names can have uppercase letters, lowercase letters, digits and $\%.$

Maximum length is $100$ characters.

Suppose you would like to test this application using equivalent partitioning.

Which of the following is represents an equivalent partition for a valid variable name?

P$1$ varname starts with a letter and length $>100$

varname starts with an uppercase letter and length $100$ and has only uppercase letters and the $\%$