(a)to any loan made, any guarantee given or any security provided or any investment made by-(i)a banking company, or an insurance company, or a housing finance company in the ordinary course of its business, or a company established with the object of financing industrial enterprises, or of providing infrastructural facilities;(ii)a company whose principal business is the acquisition of shares, stock, debentures or other securities;(iii)a private company, unless it is a subsidiary of a public company;