Former prime minister Manmohan Singh had a word of advice for incumbent premier Narendra Modi on Monday, saying he should exercise restraint when he visits states not ruled by his party and set an example with his conduct which should be consistent with his obligations as the PM. Singh was speaking at the launch of a book “Fables of Fractured Times” by former union minister Manish Tewari where former Jammu and Kashmir chief minister Farooq Abdullah was also present. “My advice to the prime minister is that he should exercise due restraint becoming of the office of the prime minister,” Manmohan Singh said.