A current source with three basic transistors is shown. All transistors are similar. All are having finite current gain Then I0 is

• A. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-1.png">
• B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-2.png">
• C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-3.png">
• D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-4.png">