“Uttar-Kand” is being called “Luv-Kush Kand” by Goswami Tulsidas in his Ramacharitmanasa. It is believed that Lord Rama asked Sita to go for Agni Pariksha to prove her purity and sanctity. It has been mentioned in the Uttar-Kand that despite having proven her sanctity in Agni Pariksha, Sita was disowned by Rama as he was afraid of rumor driven publish opinion. However, this is not written in the original Valmiki Ramayana at all.
"Valmiki Ramayana", which was written way before the Buddha era, remains unpolluted by all such distortions. Disowning of Sita, Shambhuk Vadh, Ravan-charit all these were never a part of it. It only had six Kands and the final Kand was the Lanka Kand. Uttar-Kand was added far later and even Kalidasa, Bhavabhuti and later Tulsidas could not keep the so called Luv-Kush Kand out of their narrative of Ramayana. It paved way for all anti-Rama forces to launch a scathing attack on the Maryada Purushottam, who was known for his impeccable sanctity and probity.
Vipin Kishore Sinha has written a well researched book titled “Rama never disowned Sita” published by “Sanskriti Shodh evam Prakashan”, Varanasi. The book lays bare all the misleading facts that are popularized on basis of “Uttar-Kand”. Even Father Kamil Bulke, who had carried out one of the most authentic research on Ramayana, states clearly that Uttar-Kand was never a part of the original Ramkatha and was written long time after the "Valmiki Ramayana".