Which of the following statements is true? (A) Smart cards do not require an operating system. (B) Smart cards and PCs use some operating system. (C) COS is smart card operating system. (D) The communication between reader and card is in full duplex mode.

Which of the following statements is true? (A) Smart cards do not require an operating system. (B) Smart cards and PCs use some operating system. (C) COS is smart card operating system. (D) The communication between reader and card is in full duplex mode.
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Answer :

(C) COS is smart card operating system
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