Which of the following options is the correct syntax for the following code in JavaScript?

1. A) let x = 20;
2. B) var x 20;
3. C) x = 20;
4. D) const x 20;

The correct answer is A) let x = 20;

Explanation: the let keyword is used to declare a variable in JavaScript, and the assignment operator ( = ) is used to assign a value to the variable. Therefore, the correct syntax for the code in question is let x = 20;.