A boy in a gray and yellow jacket is raising his hand in front of others sitting around him.
A boy is raisingin his hand to answer a question in his class.
Just because a boy raises his hand doesn't mean he wishes to answer a question. Just because people are seated around a boy doesn't mean that they are attending a class.
Just because a boy is raising his hand does not mean he is in class.
the boy doesn't need to be in a class to have others sitting around him and he can be raising his hand for other reasons than to answer a question