Mark 49. A 4-year-old boy has premalignant actinic keratoses and malignant and benign neoplasms. The neoplasms are predominantly basal and squamous cell carcinomas. More than 90% of the carcinomas are on the face, head and neck. The most likely diagnosis is a deficiency in which of the following metabolic processes? O A) DNA repair B) DNA replication OC) RNA processing OD) Transcription E) Translation