Which of the following is/arwe true about Central Vigilance Commission:
I. cannot direct CBI to initiate inquiries against any officer of the level of Joint Secretary and above on its own.
II. does not have powers to register criminal case.
III. deals only with vigilance or disciplinary cases.
IV. has supervisory powers over CBI.
V. does not have the power to call for any file from CBI or to direct CBI to investigate any case in a particular manner.