I love how I manage to unite the Indian and Pakistani nuclear communities against me. A true feat if I may say so myself. 1974 was not a “weapon” for very clearly technical reasons.https://twitter.com/mosharrafzaidi/status/987766947285741569 …
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So the PAF was wrong? Or it was a “worst case scenario” assessment?
Depends on what they were claiming. If they were claiming that India could, in a short amount of time, produce weapons — it's not wrong. (Depends more on separated Pu stockpile than anything else.) If they are claiming they had weapons on hand, ready to use, then seems wrong.
It took India roughly 5 years to “weaponize”, ie develop Mirage-deliverable gravity bombs, after the decision to do so in March 1989.
Sure — but if the question is, could they have had SOME kind of deliverable capability earlier than that? I mean, I don't see why not. (It might not have been a very good one!)
Plausibly. Off the back of a cargo plane, if it survived the flight 
1400 KG and 1.5 m diameter. Pretty sure a Tu-142 could carry one. Absolutely a Canberra could.
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