Which of the following institution is responsible for cyber security?

CERT-In (Indian Computer Emergency Response Team) is the national nodal agency under the Ministry of Electronics and Information Technology (MeitY) responsible for handling cyber security threats like hacking, phishing, and malware attacks, as well as strengthening the security-related defenses of the Indian internet domain.
* DRDO focuses on defense research and development.
* RAW is an external intelligence agency.
* NIA deals with counter-terrorism investigations.