Step 1: Understanding the Concept:
The question requires differentiating between Central police/investigative agencies and units that are part of a State Police force. 'Police' is a State subject under the Indian Constitution.
Step 2: Detailed Explanation:
Let's examine each option:
(A) CBI (Central Bureau of Investigation): This is the premier investigating agency of the Central Government of India.
(B) CRPF (Central Reserve Police Force): This is one of the Central Armed Police Forces (CAPFs) under the authority of the Ministry of Home Affairs, Government of India. It assists State/UT police in maintaining law and order.
(C) Prohibition Enforcement Wing (PEW): This is a specialized unit within a State Police force. For example, states like Bihar and Tamil Nadu have a PEW specifically to enforce laws related to the prohibition of liquor. Since 'Prohibition' laws are made by states, their enforcement is a state police function.
(D) CISF (Central Industrial Security Force): This is another CAPF responsible for providing security cover to industrial units, government infrastructure projects, and facilities located all over India.
Step 3: Final Answer:
CBI, CRPF, and CISF are central agencies. The Prohibition Enforcement Wing is a specialized unit that operates as part of a State Police force.