Option 1: Rajya Sabha can make recommendations on a money bill. This statement is correct. Rajya Sabha has the power to suggest changes or amendments to a money bill, but it cannot make the final decision on the bill.

Option 2: Rajya Sabha can amend a money bill. This statement is not correct. Rajya Sabha does not have the power to amend a money bill. It can only make recommendations, but the final decision on the bill rests with the Lok Sabha.

Option 3: Rajya Sabha can delay the passing of a money bill up to a maximum of 14 days. This statement is correct. Rajya Sabha can delay the passage of a money bill for up to 14 days. If the bill is not passed by the Rajya Sabha within this time, it can be deemed as passed by both houses.

Option 4: Rajya Sabha cannot reject a money bill. This statement is correct. Rajya Sabha does not have the power to reject a money bill. It can only make recommendations or suggest changes to the bill, but the final decision lies with the Lok Sabha.

In conclusion, the correct statement among the options provided is option 2: Rajya Sabha cannot amend a money bill.