Lycra of any length might be deemed unacceptable, due to its clingy-to-the-behind nature. I reckon loose cotton trousers of the sort known in India as pajamas (not what we know as pyjamas, though it's the same word!) would be suitable. Or something along the lines of Humvee three-quarters. It does depend where though; big cities and villages will have different standards, as will different parts of the country. If she's going in October, it will still be quite hot but not massively. In November, it's not. In fact November early mornings can be rather chilly. Obviously again it depends on the region.
