B) India has an especially high overall population. It's right after China when it comes to population, and it has over a billion people. Using a little math, even if you have a large Muslim population but over a billion people in your country, the percent of Indian Muslims will be small.
For much of the last quarter century, the leading theory of the driving force behind tectonic plate motions envisaged large scale convection currents in the upper mantle, which can be transmitted through the asthenosphere.