bayesian statistics

Next semester I was planning to take a course. Due to schedule clashes I can take only one of Advanced Probability theory-2( in part 1 they already covered LLN and CLT) and Bayesian Statistics. Which one will be more useful for me going into finance? Advanced Probability theory-2 covers Martingale and Markov processes rigorously.

Statistics is used a lot in arbitrage kind of positions, so I am confused about the course I should take. Any suggestions?
Generally, take statistics if you are interested in trading, and probability if you are interested in pricing derivatives.