Inside of my genki 1 workbook, we're supposed to present questions to the answers Kimura-san gives us.
For example :
You: _________
Kimura-san: よねんせいです
In this case, the answer key states that the answer is: "なんねんせいですか"
The part that confuses me is for the 2nd question:
You: __________
Kimura-san: れきしです
Here, I put "なんせんこうですか", but the answer key says that the correct answer is "せんこうはなんですか"
How does one know which arrangement to use? If the structure used in the 2nd works, then does that mean that "ねんせいはなんですか" is also a viable answer for the first question? Or could we also say "なんせんこうですか" for the 2nd question?
Thank you!