A uniform plane wave in air with H = 3 sin ( t - 8x)uzA/m is incident normally on a region with = 0, r = 1, r = 9. The reflection coefficient is

• A. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-15-1.png">
• B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-56-3.94-2.png">
• C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-15-2.png">
• D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-15-3.png">