"India will be better off signing the Nuclear Non-Proliferation Treaty (NPT), which permits the exit of any signatory nation, rather than the nuclear deal with the US that will bind the country for perpetuity', top nuclear scientist Homi Sethna has said. "NPT may be discriminatory, but we will still be allowed to exit whereas in the Indo-US deal which is under negotiation, India will remain bound in perpetuity,' Sethna said while delivering a keynote address at the Forum of Integrated National Security (FINS) here last evening. "Therefore, I prefer NPT to signing the current deal (with the US),' said Sethna, former Chairman of the Atomic Energy Commission. "India is supposed to get only uranium for expanding its nuclear programme. Simply for this, so much compromising is uncalled for,' he said.