A 12-year-old Indian-origin boy has been crowned as the UK's 'Child Genius' in a popular television quiz competition, days after he became an overnight sensation after answering all questions correctly. Rahul Doshi won the Channel 4 show 'Child Genius' by beating his nine-year-old opponent – Ronan – 10-4 in the programme's finale last night.<br/><br/> He had become an overnight sensation earlier this week after he answered all questions correctly. The school boy from north London clinched the title by answering a question on 19th Century artists William Holman Hunt and John Everett Millais.