Nepali Congress President Sher Bahadur Deuba left for Singapore for a routine health examination.He is accompanied by his spouse Arzoo Deuba.Deuba has gone to Singapore for treatment of some digestive problem and will return home on September 1, Deuba’s personal secretary Bhanu Deuba informed the Rastriya Samachar Samiti.He left for Singapore after attending the oath-taking ceremony of 13 new ministers representing the party in the incumbent government.