You can guess this is a noun version of the kanji because the hiragana sticking out of it isn't an う-related sound or an い-related sound. So, what is the noun version of answer? It's also answer.
The reading is kun'yomi, but this is also the reading you learned with the kanji so you should be able to read this and then give your 答え correctly.
The correct answer of "three plus four" is "seven."
Please pick an answer from A, B, C or D.
I don't know the answer, so I got advice from the teacher.