Choosing psychology as a major at Dhaka University from A unit can be a great idea if you have a genuine interest in the subject. Pursuing a field that you are passionate about can lead to a fulfilling academic and professional journey. It's important to consider your own interests and career goals when making this decision. Additionally, researching the specific program and faculty at Dhaka University can provide valuable insight into the quality of education and resources available for psychology students. Ultimately, following your passion and making an informed decision based on your personal interests and goals is key.