Answer:
I believe it is only C.
Explanation:
"Kushti is the sacred girdle worn by Zoroastrians around their waists."
Please forgive me if I am wrong, but I hope this helps.
The only other thing I can thing of is a Tekhelet in Judaism but it is oftenly hung from things, not wore around their waists.
Egomania is basically intolerably self-centred. In a more technical sense, it's an obsession -- an obsessive preoccupation with one's own self, usually in the form of following own impulses and have delusions of grandeur.
Megalomania is a rather loose term, and usually means have delusional fantasies of omnipotence (having unlimited or very great power, whatever 'power' might mean to that person). Interestingly, megalomania was the standard term for narcissistic personality disorder before the 1960s (so far as I recall from my psychology degree over 30 years ago).
