The correct answer is option 4: All of these.

Option 1: Industrial Development Bank of India (IDBI)

The IDBI provides financial assistance to industries in India. It offers various types of financial services such as loans, project financing, and working capital assistance.

Option 2: Industrial Finance Corporation of India (IFCI)

The IFCI is another financial institution that provides assistance to industries. It offers long-term finance, equity assistance, and various advisory services for industrial development.

Option 3: Industrial Credit and Investment Corporation of India (ICICI)

The ICICI is a leading financial institution in India that provides financial assistance to industries. It offers a range of financial products and services, including loans, corporate financing, and investment banking services.

Option 4: All of these

This option is the correct answer because all the mentioned institutions - IDBI, IFCI, and ICICI - provide financial assistance to industries. They play a significant role in promoting industrial growth and development by offering various financial products and services to support the funding needs of industries.

In conclusion, option 4 is the correct answer as all of the mentioned institutions provide financial assistance to industries in India.