The answer is B. Pretest.
In a pretest loop, the condition is evaluated before the instructions within the loop are processed. If the condition is true, the instructions within the loop are executed. If the condition is false, the loop terminates.
A posttest loop is a type of loop in which the condition is evaluated after the instructions within the loop are executed. If the condition is true, the instructions within the loop are executed again. If the condition is false, the loop terminates.
A conditional loop is a type of loop that is used to execute a block of code repeatedly until a certain condition is met. The condition can be any expression that evaluates to true or false.
An unconditional loop is a type of loop that is executed repeatedly without any condition. This type of loop is typically used to create a delay or to repeat a certain action a specified number of times.