Source of oxygen during photosynthesis

'Residex' is associated with tracking changes in which of the following?

Which Indian public sector company received the Green World Environment Award for its Thalassemia Bal Sewa Yojna? 

According to Mahatma Gandhi, which symbol represented the unity, economic independence, and equality of Indian society?

Which Indian pharmaceutical company became the first to receive WHO approval for an mRNA-based vaccine?

What is Gympie-Gympie, often referred to as the world's most toxic plant?

What significant achievement was made by the Indian Army in Eastern Ladakh in terms of infrastructure development?

Which major investment is ONGC planning to make to meet its net zero emission target?

Which government initiative aims to empower rural women by improving financial inclusion through post offices?

How many posthumous gallantry awards were conferred during Defence Investiture Ceremony 2025 (Phase-I)?