ANirupama (Pooja) says to her doctor that Vish (Kamal) was introduced by Jagannath uncle (Shekhar Kapoor). As we know - both Jagannath and Vish, works for Indian Army - we understand that the plot was a plan to get into Nirupama's office and know the company's plan for 'The Dirty Bomb'.
In this risky operation, Vish did not want Nirupama to get entangled in family politics and so chose the effeminate form to stay aloof in the marriage, without complaints.
AA dirty bomb is a speculative radiological weapon that combines radioactive material with conventional explosives. The purpose of the weapon is to contaminate the area around the dispersal agent/conventional explosion with radioactive material, serving primarily as an aerial denial device against civilians. It is however not to be confused with a nuclear explosion, such as a fission bomb, which by releasing nuclear energy produces blast effects far in excess of what is achievable by the use of conventional explosives.Since a dirty bomb is unlikely to cause many deaths by radiation exposure, many do not consider this to be a weapon of mass destruction. Its purpose would presumably be to create psychological, not physical, harm through ignorance, mass panic, and terror. For this reason dirty bombs are sometimes called "weapons of mass disruption". Additionally, containment and decontamination of thousands of victims, as well as decontamination of the affected area might require considerable time and expense, rendering areas partly unusable and causing economic damage.Src: http://en.wikipedia.org/wiki/Dirty_bombSrc: http://en.wikipedia.org/wiki/Caesium