In closed loop control system, what is the sensitivity of the gain of the overall system, M to the variation in G?

• A. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/9-04-59-1.png">
• B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/9-04-59-2.png">
• C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/9-04-59-3.png">
• D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/9-04-59-4.png">