(5)For the purposes of this section,—(a)"financial institution" means a banking company to which the Banking Regulation Act, 1949 (10 of 1949) applies, or any bank or banking institution referred to in section 51 of that Act or a housing finance company;(b)"housing finance company" means a public company formed or registered in India with the main object of carrying on the business of providing long-term finance for construction or purchase of houses in India for residential purposes.