Not many restaurants offer beef in India, but some of them replace beef with buffalo meat and a few states do offer authentic beef, like some of the best restaurants in Bangalore offer this steak and some others too. But due to the expensive nature of this meat it is very essential that this steak should be made properly and not be rushed.
Also, one should tell the server or the chef even when ordering what level they want their steak to be cooked. Usually they will ask on their own, still it is important to notify it yourself only, if you want a well done, medium rare or completely rare portion. They will cook it accordingly only.
And if one is reluctant to have beef, then one can try out buffalo meat too. But when going to have tenderloin steak one should have some basic knowledge about the dish.