List the names of some enterprises under the public sector and classify them.
Some enterprises under the public sector are
(i) Indian Railways : Departmental Undertaking
(ii) Indian Post and Telegraph : Departmental Undertaking
(iii) Steel Authority of India Limited (SAIL) : Government Company
(iv) Bharat Heavy Electricals Limited (BHEL): Government Company
(v) Life Insurance Corporation (LIC) of India : Statutory Corporation
(vi) State Trading Corporation : Statutory Corporation