The Supreme Court on Monday reserved an order on a plea filed by the December 16 Nirbhaya gang rape convicts, challenging the Delhi High Court\u2019s order. The case, in which all the four accused have been awarded death sentence, is being heard by the apex court bench headed by Justice Dipak Misra and Justices R. Banumathi and Ashok Bhushan. The four convicts \u2013 Akshay, Pawan, Vinay Sharma and Mukesh \u2013 challenged the Delhi High Court order which had sentenced them to the gallows. Earlier, the High Court, keeping in view that case falls under rarest of the rare category upheld a lower court's decision which had also sentenced all the four convicts to death penalty. The apex court had on February 3 accepted amicus curiae Raju Ramachandran\u2019s submissions that there have been violation of procedure in the sentencing of death sentence to four convicts. The accused were required to file their affidavits by February 23. In December 2012, six people had gangraped a 23-year-old physiotherapy intern in a moving bus, the incident later sparked a countrywide protest. The woman succumbed to her injuries in a Singapore hospital on December 29, 2012. Watch | Pulwama: 2 Militants Killed In Encounter With Security Forces Link - One of the six accused, Ram Singh had committed suicide in prison, while another man, who was a juvenile at the time of the crime, was convicted in August and will serve the maximum sentence of three years in a reform home. On December 3, amicus curiae Sanjay Hegde had raised questions over the evidence produced by the prosecution in the gang-rape case. Hegde came out with certain points putting a question on the merit of evidence. Hegde had pointed out that Mukesh, was not with the prime culprit Ram Singh when the offence was committed, since their mobile locations were found to be different on that night.