The correct answer is option 1 - Members of the armed forces.
The Fundamental Rights in India are guaranteed to all citizens, but there are certain categories of persons who do not have the same rights as others.
Members of the armed forces, which includes the Army, Navy, and Air Force, are not treated at par when it comes to the availability of Fundamental Rights. This is because members of the armed forces have certain restrictions on their rights in order to maintain discipline, preserve national security, and uphold the integrity of the armed forces.
On the other hand, members of the forces charged with the responsibility of maintenance of public order (option 2) and members of the forces employed in connection with the communication systems set up in the country (option 3) have the same availability of Fundamental Rights as other citizens.
Option 4, which refers to members of the forces employed in connection with the communication systems set up for maintenance of public order, is similar to option 3 and does not have any additional restriction on the availability of Fundamental Rights.
Overall, members of the armed forces are the only category of persons who are not treated at par in terms of the availability of Fundamental Rights.