I know the correct answer. I marked the correct answers with the box. Could you explain in detail why it is the correct answer? I would also appreciate it if you could tell me what subject I should study for such questions. The name of the course is Microprocessors. If you don't know, please don't answer, my question is going away.

A register named X has the above bit names. Referring to these bits, answer the following questions. Consider that register X has an unknown value. Then, after the operation K1 and B1 are definitely 0. x=044; K1 bit is definitely 1. which of the below is correct? Referring to bit names, select the correct answer. A bit can only have 4 different combinations. L bits can only have 2 different combinations. K bits can only have 3 different combinations. Consider that register X has an unknown value. Then, after the operation X&=00F; which of the below is correct