In the slotted line measurement for standing wave Ratio (SWR), the distance between the two 3-dB points is d and ' the wavelength along the transmission line. SWR of the transmission system is given by

• A. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-21-1.png">
• B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-21-2.png">
• C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-21-3.png">
• D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-21-4.png">