Select the correct answerWhich of the following is an invalid variable?Optionscode_tantra_1code_1code_tantra

To determine which of the given options is an invalid variable, we need to analyze the syntax rules of variable naming in programming languages such as Python, Java, or C.

1. Understanding Variable Naming Rules:

   • Variables must begin with a letter (a-z, A-Z) or an underscore (_).
   • Variables can contain letters, digits (0-9), and underscores.
   • Variables cannot contain spaces or special characters other than underscores.
   • Variables must not be a reserved word or keyword in the programming language.

2. Analyzing the Options:

   • code: This is a valid variable name as it starts with a letter and contains only letters.
   • tantra: This is also a valid variable name following the rules described.
   • 1code: This is an invalid variable name because it starts with a digit. Variable names cannot begin with numbers.

Final Answer

The invalid variable among the options is 1code.