"Practically speaking the engines developed for Missiles are used also in IRSO Launch vehicles." -- totally a false statement...they are not related..there are more countries who know how to make missiles then a Launch vehicles...
"Also similar technology is used to develop aerospace (fighter planes) technology. " -- we don't make fighter planes..
'The 123 agreement also restricts on certain N developments and research.Secondly US will have access to our R&D related to all Nuclear field as a clause of the 123 agreement." --both statements are wrong..