Execptions for non conformity of goods

Under the UN Convention on Contracts for the International Sale of Goods, goods do not have to comply with rules and regulations in the buyer’s state unless one of a number of exceptions applies.

Which of the following is NOT an exception to the rule?

The same rules apply in the seller’s state

The seller knew of the rules due to special circumstances

The buyer told the seller of the rules and then relied on the seller’s expert knowledge

There is evidence that the seller should have known about the rules when the contract was formed
Why is d the answer
Does that mean seller was not aware abt the rules when contract was formed