乱雑 (らんざつ): This is the correct reading of the word 乱雑, which means untidy or messy. It accurately describes the state of the son’s room being disorganized and cluttered.
混雑 (こんざつ): This means crowded or congested. It does not describe the state of being untidy or messy.
雑然 (ざつぜん): This means disorderly or chaotic. While it is related to the idea of being messy, it is not the correct word for this context.
雑多 (ざつた): This means diverse or varied. It does not describe the state of being untidy or messy.
Therefore, 乱雑 is the correct choice as it accurately describes the untidy or messy state of the son’s room.
JLPT Vocabularies and Grammars:
息子 (むすこ) – Son (N4)
部屋 (へや) – Room (N5)
乱雑 (らんざつ) – Untidy, messy (N1)
といったらない – An expression used to emphasize the extent or degree of something (N1)
散らかりよう (ちらかりよう) – The state of being messy or untidy (N1)
驚かされる (おどろかされる) – To be surprised or shocked (N1)
本 (ほん) – Book (N5)
服 (ふく) – Clothes (N5)
床 (ゆか) – Floor (N3)
散乱する (さんらんする) – To be scattered about (N1)
机 (つくえ) – Desk (N5)
ノート (のーと) – Notebook (N5)
ペン (ぺん) – Pen (N5)
無造作に (むぞうさに) – Carelessly, haphazardly (N1)
整理整頓する (せいりせいとんする) – To tidy up, to put in order (N1)