Solve this:

Q.15  Diagram shows lengthwise 2 section of a current carrying solenoid . X indicates current entering into the page, and e indicates current emerging out of the page. Decide which end of the solenoid A or B, will behave as north pole. Give reason for your answer. Also draw field lines inside the solenoid. 
                                                                                                        [Board Term I, Set-2ZGOVVV, 2015]