Single best option: B

Reasoning: Absolute contraindications to DPT include a prior anaphylactic reaction, progressive or uncontrolled neurologic disease, or encephalopathy after a pertussis-containing dose; convulsions are only a precaution, and the vaccine itself is inactivated, so even a severely immunocompromised patient may safely receive it [ACIP, 1991, PMID 1865873; Bouchaud, 1997, PMID 9255338].