Which one of the following links all the ATMs in India? Indian Banks’ Association? National Payments Corporation of India? [2018]

Which one of the following links all the ATMs in India?

In 2009, the National Payments Corporation of India (NPCI) assumed control of the National Financial Switch (NFS) ATM network from the Institute for Development and Research in Banking Technology (IDRBT). The objective was to enhance the connectivity of ATMs across the country and streamline convenience banking.

NPCI is an umbrella organisation for operating retail payments and settlement systems in India.
It is an initiative of the Reserve Bank of India (RBI) and the Indian Banks’ Association (IBA) under the provisions of the Payment and Settlement Systems Act, 2007, to create a robust Payment & Settlement Infrastructure in India. It has been incorporated as a “Not for Profit” Company under the provisions of Section 25 of the Companies Act 1956 (now Section 8 of the Companies Act 2013).
The NPCI can operate payment systems such as the National Financial Switch (NFS), Immediate Payment System (IMPS), Aadhaar-enabled Payments System (AEPS), and National Automated Clearing House (NACH).