Sir,
The definition of body corporate and company is given at Section 2(11) and 2(20) of Companies Act, 2013, which is as under :-
"(11) "body corporate" or "corporation" includes a company incorporated outside India, but does not include-
(i) a co-operative society registered under any law relating to co-operative societies; and
(ii) any other body corporate (not being a company as defined in this Act), which the Central Government may, by notification, specify in this behalf;
(20) "company" means a company incorporated under this Act or under any previous company law
Based on above, I am of the view that LLP/Firm, are incorporated under Limited liability Partnership Act,2008/ Indian Partnership Act,1932 and not under the Companies Act, 2013. Therefore, they are not within the ambit of term "Body corporate". Further, the "company" as per the explanation (i) of Section 137 of CGST Act, 2017, is for purpose of said section only.
Thanks