Manmohan Singh congratulated all five recipients of Infosys Prize in various categories.
Singh said, "As for Upinder getting the prize, as a father I naturally feel very proud. I am grateful to God, he has given me such gifted children."
He was speaking to reporters after the award presentation function. He was accompanied by his wife Gursharan Kaur.
Upinder, a Professor of History in the Delhi University, was given the award for her contributions as a historian of ancient and early medieval India.