This match-the-following is best solved by knowing the true level of the defect for each cause of amenorrhoea.
$\textbf{Asherman}$ acts at the uterus itself - scarring and adhesions of the endometrial cavity, typically following a postpartum or post-abortion curettage, so menstruation stops despite normal ovarian and pituitary hormones. $\textbf{Sheehan}$ is a pituitary problem: ischaemic necrosis of the gland after postpartum haemorrhage lowers FSH and LH (hypogonadotropic). $\textbf{POF}$ is an ovarian problem where the gonads fail and FSH rises markedly (hypergonadotropic). $\textbf{PCOD}$ features chronic anovulation with a high LH:FSH ratio and androgen excess.
Checking the options, only the first - Asherman paired with intrauterine adhesions from endometrial scarring - states the mechanism correctly. The remaining three deliberately swap mechanisms (PCOD is not low-LH, Sheehan is not ovarian, POF is not an outflow block).
\[\boxed{\text{Asherman} = \text{intrauterine adhesions}}\]