How is the Governor of a state appointed?

The Governor of a state is appointed by the President of India. While appointing the Governor the President has to see the qualifications mentioned in the Constitution. Though the formal appointment of the Governor is made by the President, yet actually he is a nominee of the Central Cabinet. In fact, this is a political post and the Prime Minister and the other members of the Cabinet would like to have men of their confidence on such key posts. A wrong system is being set up these days. The party/group in power at the centre are appointing retired or recalcitrant politicians as Governors.