Which instruction results in a destination tag that contains the sum of Source A and Source B?

The instruction that results in a destination tag containing the sum of Source A and Source B is the ADD instruction. This instruction is specifically designed to perform addition operations, taking two specified sources as inputs and producing their sum as the output. The result is stored in a designated destination tag, enabling it to be used later in further calculations or operations.

The ADD instruction's primary purpose is to add numerical values together, which aligns with the requirements of the question highlighting that the destination tag needs to reflect the sum of the two source values. In the context of programmable controller systems, using the ADD instruction is a fundamental operation that is essential for various applications, particularly those involving arithmetic logic.