"We have strong disagreement with findings of Walk Free Foundation, which they have released with a catchy caption. At the outset, it is emphatically stated that we don't have any instance of slavery in its conventional sense," Dattatreya said in a statement.
"In our view, the NGO has totally failed to develop correct understanding of the Indian society and has arrived at misleading findings. Methodology of the survey itself is fallacious and the so called findings are based on presumptions and surmises."
Explaining further, Dattatreya said: "It is not slavery in the sense, it is understood by modern world. We deplore that an international NGO has attempted to tarnish the image of our country."
India has been taking pragmatic and expeditious steps against a number of social evils since independence. The conventional forms of caste bondage in India are essentially a social system, the Minister added.
Forced marriages, caste discrimination, child labour, among others, are not slavery in conventional sense but unacceptable social practices of a modern society, Dattatreya said.
"However, we are committed to eliminate all such social practices expeditiously. We have already taken a large number of determined steps in this direction," the Ministry added.