Explanation: Option b correctly identifies CEIR as a DoT initiative that maintains comprehensive IMEI-based records, uses the three-tier classification system (White, Grey, Black lists), and provides tracking capabilities independent of SIM card changes across all network operators. The other options contain inaccuracies regarding the managing authority, primary functions, or operational mechanisms.
Explanation: Option b correctly identifies CEIR as a DoT initiative that maintains comprehensive IMEI-based records, uses the three-tier classification system (White, Grey, Black lists), and provides tracking capabilities independent of SIM card changes across all network operators. The other options contain inaccuracies regarding the managing authority, primary functions, or operational mechanisms.