Its an extract from the novel Eye of the needle by author Ken Follett. Even though I had read it 5 years back..its this extract more than the plot of the novel which still lingers in my head..!!
So today I just downloaded this book, got a screenshot(and added a few effects :P) and posting it here in hope that others might find it intriguing as well..
I am sure there must be specific term for such kind of a moral dilemma.. do let me know if someone knows..