West Bengal Chief Minister Mamata Banerjee said on Saturday Netaji Subhas Chandra Bose "must be given the title (of) Leader of the Nation", minutes after Prime Minister Narendra Modi declassified a set of files relating to the freedom fighter.
"Netaji Subhas Chandra Bose must be given the title 'Leader of the Nation'. He deserves that honour," she tweeted.
"We believe that the truth about the last days of Netaji must come out through documentation and proof."
"It is our responsibility towards the young and future generation to share with them the truth...," the Trinamool Congress chief said in a series of tweets.
Netaji, one of the leading lights of the Indian freedom struggle, set up the INA during World War II to take on the British Indian Army.
A former Congress president and once a close associate of Mahatma Gandhi, Bose's reported death in a plane crash in Formosa, now Taiwan, in 1945 has remained a mystery.