(a) its false,advance mobile phone system(AMPS) is first generation cellular phone system.It uses separate frequencies or channels for conversation that's why it requires considerable bandwidth for large number of users.
(b)its true,IS-95 is a second generation cellular phone system based on CDMA and DSSS.
(c) its true,the third generation cellular phone system will provide universal personnel communication.
hence option (2) is correct.