A signal flow graph of a system is given belowThe set of equations that correspond of this signal flow graph is

• A. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-40-1.png">
• B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-40-2.png">
• C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-40-3.png">
• D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-40-4.png">