The correct option is
C Mercedes, Cardilac and Fargo
We can analyse the given information as follows
From the first point, we have
Fargo, CardilacFrom second point we get
Fiat, ? , ? , ? , Fargo, Cardilac
And then from the 3rd and 4th points we can have
Fiat, Bedford, Maruti, Ambassador.
Knowing that Fiat lies at one of the ends, we have from left to right
Fiat, Bedford, Maruti, Ambassador, Fargo, Cadilac, Mercedes
So, we can see that Mercedes. Cardilac and Fargo is a group of cars which is to the right of the Ambassador car.
Hence C is the answer.