In the following series, count each N which is immediately followed by X but X is not immediately followed by T. How many such N's are there ? N X N T Q M N X T M X N X C N Q M N N X Q N X T X N A M X N X M
Answer: B. 4
N X N T Q M N X T M X N X C N Q M N N X Q N X T X N A M X N X M