On which of the following days is International Literacy Day observed every year?

Which of the following has launched the India Net Zero Portal and the NAPCC dashboard to monitor and promote net-zero goals and climate change-related initiatives? 

Which zone of Indian Railways has recently achieved the target of 100% electrification?

Which of the following has become the first woman officer of COBRA unit of CRPF?

On which of the following days is World Ozone Day observed every year?