A STUDENT who hurled herself to her death after failing to conquer exam stress had been on track for good marks in yesterday's Form Five results, Coroner John Saunders told her grieving teachers and friends. As successful students celebrated, the Coroner's Court traced the anxieties of exemplary student Chuang So-hung, 20, who jumped from a building because she feared failure. 'There is tragic irony about the fact that we are holding this inquest today,' Mr Saunders said. 'The exam results are being released and from the evidence we would expect this young lady to have passed the exam with good results.' The Form Five student was near the top of her class when she died, the court heard. The stress of the Hong Kong Certificate of Education Examination was more than she could bear. Chuang was attending the Buddhist Hung Sean Chau Memorial College near Choi Hung. At 20, she was several years older than her classmates. Her mainland origin was the reason for the lag. Chuang had moved to Hong Kong from the mainland when she was 14. The quiet teenager soon rose to the top of her class. 'She passed everything with flying colours,' geography teacher Chan Chi-ying said. 'She was second in my class. She was in the first five students overall.' But Chuang still lived in terror of failure. As the exam date drew near, she stopped sleeping. 'She was uncertain about the future,' her brother Chuang Chun-cheong, 24, said. 'She worried about the exam, especially maths and English. 'She set high standards for herself.' On February 16, Mr Chuang came home to discover his sister had downed 90 sleeping pills. 'She said she wanted to commit suicide,' he said. 'She said she had lost interest in her studies.' He bundled her into a taxi and rushed her to hospital. She stayed there for five days, and was diagnosed as suffering from 'adjustment reaction' - an inability to cope with a stressful event. Chuang's parents did not know why their daughter was in hospital; Mr Chuang told them she was being treated for insomnia. Mr Chan was similarly misled. When he asked his students why his star pupil was away, they told him she was suffering from a minor illness 'like a cold'. But as soon as Mr Chan saw her on February 21, he knew something was wrong. 'The day after she was let out of hospital she looked pale and told me she was not feeling well,' he said. 'She said she was in a low mood.' Two days later, Chuang left the school and headed down the street to a 15-storey residential building. She climbed to one of the upper floors and hurled herself to the pavement below. One juror asked Mr Chuang what he thought had driven his sister to take her own life. 'She had a psychological knot that she was unable to untie herself and no one was able to help her to untie that knot.' The jury returned a verdict of death by suicide.