Well as I said you would have to have an extremely bad financial sense to exercise that option. As you could trade your options and make more out of them.
Firstly it doesn't matter how many you buy so that's irrelevent information.
Strike 120 How much did you pay (that would be useful to help people thought not essential)
Price of underlying 190
Therefore intrinsic value is 70. You can exercise and get this intrinsic value, or you can sell your option for 75, and make an extra 5pts.
I know what most people would do.
Anyway you would never be exercising that against me, as I would never let it get to that stage, and if I did, I would be well hedged, and so you can exercise whenever you want matey.
As Windlesham said, barrow boys!!!
Bulldozer mate, you go ahead and exercise that option, well done buddy.
I quite like trading against people who don't quite understand options!