Exponent of ‘Input- Output Approach’ in political system theory ? / » Political Ideas, Concepts and Ideologies solved MCQs / By admin Question: Exponent of ‘Input- Output Approach’ in political system theory ? A. david easton B. karl deutsch C. parsons D. merton Answer» a. david easton Note: The above multiple-choice question is for all general and Competitive Exams in India.