The correct options are
A The partymen can attack others in case someone obstructs their political meeting.
B The political parties do not need prior permission from police authorities.
Political parties have to obtain prior permission from police authorities. This will enable the police to manage traffic and provide enough security. They can prepare themselves to protect law and order during the public meeting or campaign meeting organised by a particular political party.
In case someone obstructs the political meeting, the partymen are not supposed to attack them, but must inform the police.