The GCE O/L examination will commence on December 03 at 4,661 centres countrywide and go on till Dec. 12. A total of 656,641 candidates including 233,791 private applicants will sit the examination.Commissioner General of Examinations B. Sanath Pujitha said that special examination centres would be held at the Magazine Prison in Colombo for prisoners, at Tangalle and Ratmalana for the visually handicapped children and at Matara and Chillaw for children who needed special care.There would also be 541 examination coordinating centres countrywide, he said. Pujitha said that admission cards for school candidates had been sent to the principals of schools and in the case of private candidates, they had been posted to their residential addresses.He asked students to check their admission cards for any mistakes before the examination and contact the school examinations organising branch of his department if there were any errors.Complaints could be conveyed to the Examinations Department through 1911, 0112784208, 0112784537 or fax to 0112784422, he added.