Millions of hopeful medical students across India are resitting a crucial exam under unprecedented security, after the first paper was cancelled following allegations that the questions had been leaked.
The Indian Air Force transported the new test papers to some regions, while police and paramilitary officers were deployed at the 5,440 exam centres across the country.
The National Eligibility cum Entrance Test (Undergraduate), known as NEET-UG, is required for students to join medical colleges in India.
Of the millions who take the exam every year, only a small percentage do well enough to secure a coveted college placement.
Nearly 2.28 million candidates sat the exam on 3 May, having studied for months - in some cases years - for the notoriously difficult paper.
The news that it had been scrapped was devastating for many students, and the scandal sparked widespread protests and demands for Education Minister Dharmendra Pradhan to resign.
The National Testing Agency (NTA) said every exam room, of which there were more than 95,000, had been fitted with security cameras, and that more than 1.3 million cameras in total had been installed.
It added that 51,311 jammers were being used to block phone signals and electrical interference. Controversially, Telegram has been temporarily blocked until Monday, over concerns the messaging app could be used for cheating.
Nearly 39,000 frisking staff had been employed across the country to check for any prohibited items, the NTA said, and there would be 40-50 security personnel stationed at every exam centre.

-BBC