Sir,
According to Section 16 (1) of CGST Act, 2017 "every registered person shall, subject to such conditions and restrictions as may be prescribed and in the manner specified in section 49, be entitled to take credit of input tax charged on any supply of goods or services or both to him which are used or intended to be used in the course or furtherance of his business and the said amount shall be credited to the electronic credit ledger of such person.
According to Section 17 (5) (a) of CGST Act, 2017 "Notwithstanding anything contained in sub-section (1) of section 16 and subsection (1) of section 18, input tax credit shall not be available in respect of the following, namely:-
(a) motor vehicles and other conveyances except when they are used––
(i) for making the following taxable supplies, namely:-
(A) further supply of such vehicles or conveyances ; or
(B) transportation of passengers; or
(C) imparting training on driving, flying, navigating such vehicles or conveyances;
(ii) for transportation of goods.
Therefore if the car is used in the course or furtherance of his business itc is available . Otherwise it is not available.