Which one of the following is the first and the oldest Government-owne

Which one of the following is the first and the oldest Government-owned coal mining company in India ?

Neyveli Lignite Corporation
Singareni Collieries Company Limited
Coal India Limited
Mahanadi Coalfields Limited
This question was previously asked in
UPSC CDS-2 – 2022
Singareni Collieries Company Limited (SCCL) is the oldest government-owned coal mining company in India. It was incorporated in 1889 (originally as Hyderabad (Deccan) Company Limited) and nationalized in stages.
SCCL operates coal mines in Telangana and has a long history of coal production.
Coal India Limited (CIL) is the largest coal producing company in the world but was formed much later in 1975 after the nationalization of coal mines. Neyveli Lignite Corporation (now NLC India Limited) mines lignite. Mahanadi Coalfields Limited (MCL) is a subsidiary of CIL.