The variable can be a declared by . . . . . . . .statement .

The correct answer is: B. var

A variable is a location in memory that can store a value. The value can be a number, a string, or an object. To declare a variable, you use the var keyword. For example, the following statement declares a variable named x that can store a number:

var x = 10;

The var keyword is used to declare variables in most programming languages, including JavaScript, Python, and Java.

The other options are incorrect because they are not valid keywords for declaring variables.

• dim is a keyword used to declare variables in Visual Basic.
• $ is a symbol used to access variables in Perl.
• none of these is not a valid keyword for declaring variables.