The correct answer is c) Black Gold.
Black pepper is a spice made from the dried unripe berries of the Piper nigrum plant. It is native to India, but is now grown in many tropical countries. Black pepper is one of the most widely used spices in the world, and is known for its strong, pungent flavor. It is used in a variety of cuisines, and is also used in traditional medicine.
Black pepper is a major spice export from Kerala, India. It is known as “Black Gold” because of its high value and importance to the local economy. The pepper trade has been a major source of income for Kerala for centuries, and the state is still one of the world’s leading producers of black pepper.
The other options are incorrect. Red Gold is a name given to the spice saffron, which is native to Iran. Green Gold is a name given to the tea plant, which is native to China. White Gold is a name given to the metal silver.