Leader of Opposition LK Advani and BJP President Rajnath Singh on Thursday called on Prime Minister Manmohan Singh, who is convalescing after a prostate gland surgery.
They enquired about the Prime Minister's health, a PMO spokesman said adding it was a courtesy call.
Union Minister and senior DMK leader T R Baalu also met the Prime Minister at his residence.
Congress President Sonia Gandhi had called on the Prime Minister last evening.
Singh, who was admitted to AIIMS on Saturday last for the surgery, was discharged on Tuesday.