Given the task definition and input, reply with output. In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Question: In what town was the person born who was mentally challenged and in police custody in 1952? Passage:One of the most notorious cases of this type was the 1952 case in England involving Derek Bentley, a mentally challenged man who was in police custody when his sixteen-year-old companion, Christopher Craig, shot and killed a police constable during a botched break-in. Craig was sentenced to be detained at Her Majesty's Pleasure, since as a juvenile offender he could not be sentenced to death (he was released after serving ten years), but Bentley was hanged despite popular protest. The incident was dramatized in the film Let Him Have It, which is what Bentley allegedly said to Craig during the incident, which can be interpreted either as telling Craig to shoot the policeman, or to give him the gun. The hanging of Bentley led to public outrage and sparked the MP Sydney Silverman's campaign to abolish capital punishment in the United Kingdom, achieved c. 1965.
Links: a. Derek Bentley case b. At Her Majesty's pleasure c. Capital punishment in the United Kingdom d. Derek Bentley case
a