In Software Engineering Jackson’s Principle based on A. Designation B.…

Correct answer: A, B & C Only

Explanation: Jackson's Principle for writing specifications emphasizes three core elements: designation, definition, and refutable assertions. These ensure specifications are clear, unambiguous, and testable.

• Designation: Give clear names or labels to entities and concepts so readers know exactly what each term refers to.

• Definition: Provide precise meanings for each designated term to avoid ambiguity.

• Refutable assertions: State requirements and properties in a form that can be tested or falsified (so compliance can be checked).

Why the other choices are incorrect:

• The choice 'B, C & D Only' includes Formal Review (a verification activity) and omits designation, so it does not match Jackson's Principle.

• The choice 'C, D & E Only' replaces designation and definition with Formal Review and Requirement Elicitation, both of which are process activities rather than the specification elements Jackson described.

• The choice 'B, D & C Only' again includes Formal Review and omits designation, so it is incorrect for the same reasons as above.

Summary: The correct selection is the one that lists designation, definition, and refutable assertions because those are the foundational elements Jackson recommended for clear, testable specifications.