Prabhu met Lighthizer at the initiative of Argentinean minister Susana Malcorra, who is also the chair of the World Trade Organisation's (WTO) 11th Ministerial Conference, official sources said.
Lighthizer, the officials said, told the commerce minister that the US administration is against the WTO system and not against India per se.
Earlier in an oblique reference to India and other developing countries, Lighthizer had accused five of the six richest countries in the world for seeking concessions on the basis of self-proclaimed development status.
Prabhu had retorted by emphasising that special and differential treatment was "an important component of the WTO... You cannot ignore realities that certain societies have been left behind in the process of development."
Among others, Prabhu met Johann N Schneider-Amman, Minister of Economic Affairs, Education and Research of Switzerland, and Jorge Faurie, Foreign Affairs Minister of Argentina.
Participating in a session on food, the minister underlined the need for promoting food and nutrition security for India's vast population.
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