In this case the bill has been issued in name of buyer's Ahmedabad Head Office. So VAT credit would be taken within Ahmedabad only.
As in the eyes of law the person or a company or an entity in whose name bill has been issued is considered, not the ultimate place to where the goods have been taken is considered. As when if authorities cross check whether the credit is taken against an eligible purchase, they will see & consider the purchase bill and the entity on whose name it has been issued. They would not like to physically themselves go and check where the goods have been consumed whether in Bombay or in Ahmedabad. So, that's why only the destination of the buyer printed on the bill, will make him eligible to take VAT credit in that state only.