The Ambaji region in Gujarat is known for deposits of:

Lead and Zinc
Manganese
Iron ore
Gold

The correct answer is: a) Lead and Zinc.

The Ambaji region in Gujarat is known for its deposits of lead and zinc. The region is home to several mines that produce these metals. The mines are operated by private companies and the government. The metals are used in a variety of industries, including the manufacturing of batteries, electronics, and construction materials.

Lead is a heavy metal that is soft and malleable. It is used in a variety of applications, including batteries, ammunition, and solder. Zinc is a bluish-white metal that is used in a variety of applications, including galvanizing steel, batteries, and alloys.

The Ambaji region is also known for its deposits of manganese, iron ore, and gold. However, these deposits are not as significant as the lead and zinc deposits.

Manganese is a gray-black metal that is used in a variety of applications, including steelmaking, batteries, and fertilizers. Iron ore is a red ore that is used in the production of steel. Gold is a yellow metal that is used in jewelry and other decorative items.