Of what profession was Freddy Krueger's mother in 'A Nightmare On Elm Street'?

October 1918: Amanda Krueger is born in Westin Hills hospital in Springwood, Ohio.
July 1936: At the tender age of 18, Amanda decides to devote her life to God and becomes a nun. Her name in Christ was to be known as "Sister Mary Helena." Her first assignment as a nun is to, ironically, the place she was born, Westin Hills. She is put in "The Tower", which was the insider nickname for the place where the absolute worst of the criminally insane were locked up like animals.
December 1937: During the holiday season, just a few days shy of Christmas, Amanda Krueger was accidently locked in "The Tower" when the guards were in a hurry to go home to their families. The inmates kept her hidden for several days, brutally raping and beating her. When she was finally found, she was barely alive, and pregnant.
September 1938: After a breech birth, Fred Charles Krueger is born. Amanda decides to raise the boy, and the convent allows her to stay on as a nun.

Yes NUN is the correct answer. Freddy Krueger is said to be the son of 100 madmen (the inmates who raped Amanda Krueger), although this is technically impossible.

He was actually described in the film by Sister Mary Helena(Freddies Mother) as 'The bastard son of 1000 maniacs !