Pick the correctly spelt word.

'Homoeopathy' (or 'Homeopathy') is the correct spelling of the alternative medical system based on the principle of 'like cures like' and using highly diluted substances. Options A, C, and D have incorrect letter placements or combinations. The spelling with 'oe' as in 'Homoeopathy' is the traditional British spelling, both 'Homoeopathy' and 'Homeopathy' are accepted variants.