Who was R.A.B as mentioned in the half blood prince?
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Regulus Albus Black
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Regulus Arcticas Black
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Regulus Arcturus Black
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Regurulus Alreds Black
C
Correct answer
Explanation
R.A.B stands for Regulus Arcturus Black, Sirius Black's younger brother. He discovered Voldemort's secret about horcruxes and stole the locket (the one found in the Black house) from the sea cave, sacrificing his life in the process. The middle name options are distractors - Arcturus was his actual grandfather's name he was named after.