Q. Which neighbouring state borders both Chatra and Sahebganj districts of Jharkhand?
Answer: Bihar
Notes: Chatra district in northern Jharkhand borders Gaya district of Bihar to the north. Both Chatra and Sahebganj are among Jharkhand's ten districts that share a border with Bihar. Sahebganj also shares a border with West Bengal, but only Bihar borders both districts. Jharkhand shares borders with Bihar, West Bengal, Odisha, and Uttar Pradesh, but only Bihar borders both these districts. Uttar Pradesh and Odisha do not border Chatra or Sahebganj.