Where is the largest oil refinery located in India?

What was the real name of Birbal?

Which country of the world has the largest number of post offices?

When was the insignia chosen for the Indian currency?

Which one of the following is not a type of coal?

The coating of zinc on water pipes made of iron to protect it from corrosion is called?

Who is considered to be the founder of Khayal and Tarana in Indian classical music?

In which of the following cities, the first female post office of the country has been established in March 2013?