Concept:
The Information Technology Act, 2000 provides the legal framework for cybercrime investigation in India. Section 78 specifies the rank of officer authorized to investigate.
• Deals with cyber offences.
• Provides legal procedure for investigation.
• Protects digital systems and users.
Step 1: Recall Section 78 of IT Act.
It states:
Only police officer not below the rank of Inspector can investigate
IT Act offences.
Step 2: Interpret the rule.
This means:
Sub-Inspector rank is not sufficient
for such investigations.
Step 3: Compare options.
• Sub-Inspector -- below required rank
• Deputy SP -- higher rank
• Superintendent -- higher rank
• Inspector -- minimum correct rank
Step 4: Final conclusion.
Hence, the correct answer is:
\[
\boxed{\text{Inspector}}
\]