Which of the following is NOT a known effect of radiation exposure on hair loss?

Radiation-induced alopecia can cause Telogen effluvium (shock-induced hair loss cycle disruption — A), Alopecia areata (autoimmune, but radiation can trigger it — B), and Radiation-induced fibrosis (leading to permanent alopecia — C). ANDROGENETIC ALOPECIA (male/female pattern baldness) is a GENETIC/hormonal condition (DHT-mediated) — it is NOT caused by radiation exposure. D is the correct 'NOT' answer.