AAI signed MoU with NTPC Vidyut Vyapar Nigam (NVVN)

Current Context: The Airports Authority of India (AAI) has signed MoU with NTPC Vidyut Vyapar Nigam (NVVN), which is the subsidiary of NTPC.

• They have signed MoU to promote the use of electric vehicles and setting up solar power plants at airports of AAI.
• Under this MoU, NVVN will be providing adequate land and rooftop space at free of cost at AAI airports in order to build solar plants.
• The initial phase of MoU will be conducted in airports at Tamil Nadu and Rajasthan, where solar capacity required, is around 55 MW and 8 MW, respectively to become 100 per cent solar-powered airports.
• Also, both AAI and NVVN will support GOI’s initiative to adopt electric vehicles by developing a public charging infrastructure.
• Static Part: 
• HQ of AAI: New Delhi
• Chairman of AAI: Arvind Singh
• HQ of NTPC: New Delhi

Question: 

Q.1 Who among the following signed MoU with NTPC Vidyut Vyapar Nigam (NVVN) to promote the use of electric vehicles and setting up solar power plants?
a. Air India
b. Airports Authority of India
c. DRDO
d. IIT Roorkee