Please help

An analyst is estimating whether a fund's excess return for a quarter is related to interest rates and last quarter's excess return. The regression equation is found to have serial correlation. Which of the following is most accurate? Parameter estimates will be accurate and statistical inference about the parameters will also be valid. Parameter estimates will be inaccurate and statistical inference about the parameters will not be valid Parameter estimates will be inaccurate but statistical inference about the parameters will be valid Parameter estimates will be accurate but statistical inference about the parameters will not be valid