"What happened on December 16, 2012 was very unfortunate, but it is important to note that such juveniles are used by adults.
"I think the boy should be given another chance to live," Kavita Krishnan, secretary of All India Progressive Women's Association (AIPWA), said.
"Law should be implemented. According to the law, a boy below the age of 18 years is not sent to jail. He was kept in observation home for three years. Even the High Court said that the law should be implemented," she added.
"The system has failed to deliver justice for most complainants who came forward to seek justice under the new rape laws.
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"Yet those who rule the system instead of implementing existing laws and ensuring justice in each case, prefer to divert attention towards yet another severe law," she added.
Calling it a sad day for women of the country, activist Ranjana Kumari said there is nothing wrong in making exceptions in law in certain cases.
Annie Raja, general secretary of the National Federation of Indian Women, said the juvenile has been meted out a "softer sentence" and the example set by his release would not act as a deterrent for the crime he had committed.
Another activist Abha Singh said, "Juvenile justice Act Section 15 tells that no juvenile can be punished for more than three years.
The convict, who is now 20-years-old and was known to be the most brutal of the attackers, has been taken to an undisclosed location from a correction home in North Delhi amid concerns that there was a threat to his life.
In their order pronounced at2 AM, a vacation bench comprising Justices A K Goel and U U Lalit refused to stay his release, scheduled for today, by giving an urgent hearing and posted the matter for hearingtomorrow.
The girl subsequently succumbed to her injuries 13 days later in Singapore.
The incident caused nationwide outrage and led to widespread outpouring of anger against the rapists, including the teenager.