<prompt> All of the following are true statements about Cockayne syndrome, EXCEPTDefective transcription-coupled repairPhotosensitivityIncreased risk of cancerMental retardation  <response>: Cockayne syndrome: Defect in transcription coupled nucleotide excision repair. CF : failure to thrive, microcephaly, hearing loss, nervous system anomalies, photosensitivity. Patients are not predisposed to cancer. 