Doha: Rates against US Dollar as issued on Sunday by Qatar National Bank (QNB) are as following:According to Qatar News Agency, the buying and selling rates for various currencies against the US Dollar have been released by QNB. These rates are crucial for businesses and individuals involved in international transactions and foreign exchange activities.The announcement of these exchange rates provides a benchmark for the currency market in Qatar, helping to facilitate trade and investment by offering reliable information on the value of the Qatari Riyal in relation to the US Dollar.