New Delhi, hoping to be officially recognised soon as the world's sixth atomic power, also said its proliferation record was much better than some recognised nuclear nations and urged the world to partner India and not target it.
The comments by Indian Foreign Secretary Shyam Saran were the first by New Delhi to strongly target Pakistan's alleged role as a nuclear proliferator.
"The international community must focus not merely on recipient states but on supplier states as well," Saran said, referring to the transfer of prohibited nuclear supplies.
"Otherwise our global non-proliferation effort would be undermined by charges of motivated selectivity and discrimination," he said in a lecture on non-proliferation.
Saran said the International Atomic Energy Agency (IAEA) should clarify the role of nuclear scientist Abdul Qadeer Khan, who admitted last year to leaking nuclear secrets to Iran, Libya and North Korea.