What nickname was Einstein given in childhood?

Correct answer: Brother Boring

The governing concept is recall of a specific biographical detail and the behaviour behind it. In the lesson, Einstein was called “Brother Boring” because he was unlike ordinary children and did not readily join their games or social activities; therefore option A is correct. “Little Professor” may sound plausible because Einstein later became a celebrated intellectual, but it is not the nickname given in this childhood account. “Smart Boy” is a generic invented label, and “King of Science” is a later-style exaggeration rather than a childhood name. Connecting the nickname with his quiet, solitary nature helps distinguish the correct answer from attractive but unsupported alternatives.