Which of the following does the work of linking all the ATMs in India?

Correct option is B

The correct answer is option (b): National Payments Corporation of India (NPCI)
Explanation:

Role of NPCI:

The National Payments Corporation of India (NPCI) is an umbrella organization for operating retail payment and settlement systems in India.
It was established in 2008 under the guidance of the Reserve Bank of India (RBI) and the Indian Banks' Association (IBA).
One of NPCI’s key functions is managing the National Financial Switch (NFS), which links all the ATMs in India.

National Financial Switch (NFS):
NFS is a network that interconnects all ATMs across India, enabling customers to access their bank accounts from any ATM, irrespective of the bank.
Managed by NPCI since 2009, the NFS ensures seamless ATM transactions across different banks.
  

Information Booster:

Key Responsibilities of NPCI:

• Operates Unified Payments Interface (UPI).
  
• Manages the Immediate Payment Service (IMPS).
  
• Oversees Bharat Bill Payment System (BBPS).
• Maintains RuPay, India’s domestic card payment network.
  

Other important institutions:

• Securities and Exchange Board of India (SEBI): SEBI regulates the securities market.
  
• National Institute of Banking and Management (NIBM): NIBM is an academic institution providing training and research for banking professionals.
  
• D. Reserve Bank of India (RBI): The Reserve Bank of India (RBI) is the central bank of India, responsible for regulating the country's monetary policy, issuing currency, supervising financial institutions, and ensuring economic stability.​