<prompt> Direction of fusion of neural folds during formation of neural tube is:CaudalCranialBoth of the aboveNone of the above  <response>: Gradually, the neural folds approach each other in the midline, where they fuse. Fusion begins in the cervical region fifth somite and proceeds cranially and caudally. As a result, the neural tube is formed. Ref: Langmans embryology 11th edition Chapter 6. 