Hi,

Please dont worry. That will not create any problem. In fact if you forget the name also, they will not reject. So rest easy and prepare for the exam. dont bother about rectification as the admit card and acknowledgement should have your correct name. They wont match the name with the one in the photograph. They will only use it to identify you and nothing else. So if the name in the acknowledgement page is correct, you go ahead with your preparation. Also once the application is scrutinized by CBSE, they will get back to students whose images need to be rectified. Right now nothing to be done from your end. All the best!

Also one piece of advice. Get the name rectified using the same photo. You will need 8 copies of them if you qualify in the exam and are called for counselling. You dont want to again agonize over it.