Which of the following is not a risk factor for breast carcinoma?: (A) Saturated fatty acids, (B) Early menopause, (C) Nulliparous women, (D) Oestrogen unopposed by progesterone
Answer is B. Causes for breast carcinoma are -

Oestrogen exposure, unopposed by progesterone
Nulliparous women
Mutations in the  BRCA1 and BRCA2 genes 
Early menarche/late menopause 
Family history 
Saturated dietary fats
Previous benign atypical hyperplasia