Which of the Following Statement Is Incorrect

Which of the following statement is incorrect?

A) The Certifying Authority issuing the Digital Signature Certificate may suspend it on receipt of a request to that effect from the subscriber
B) The Certifying Authority issuing the Digital Signature Certificate certifies that subscriber's public key and private key constitute a functioning key pair
C) The Certifying Authority issuing the Digital Signature Certificate may revoke it upon the death of the subscriber
D) The Digital Signature Certificate once issued cannot be revoked by the Certifying Authority as the power of revocation is vested in the Cyber Appellate Tribunal