Which is the biggest refinery in India?

Which of the following is the largest centre of petro-chemical industry in India ?

The industry which is benefitted by the Kemmangundi mines near Bhadrawati, is:

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

In which of the following cities of India, the first synthetic rubber plant of the country was set up?

Which one of the following industries is not a 'Weight loss industry'?