One who is interested in the welfare of women

Answer: Option B

One word substitute is Feminist.

Feminine: having qualities or an appearance traditionally associated with women, especially delicacy and prettiness.
Feminist: a person who supports feminism.
Effeminate: (of a man) having characteristics regarded as typical of a woman; unmanly.
Flamboyant: (of a person or their behaviour) tending to attract attention because of their exuberance, confidence, and stylishness.