Step 1: In most women the uterus normally lies anteverted and anteflexed - the fundus is tipped forward over the bladder at the cervico-vaginal junction. The question asks which ligament keeps this forward tilt (anteversion).
Step 2: The round ligament of the uterus runs from the uterine cornu, through the inguinal canal, to the labia majora. Its pull on the fundus draws it forward, and this is the structure responsible for maintaining anteversion, including during pregnancy. Hence option (d) is correct.
Step 3: The distractors give static cervical support, not anteversion. The cardinal (Mackenrodt) ligament and the uterosacral ligament chiefly hold the cervix and uterine angle in place and prevent prolapse; the pubocervical ligament supports the cervix anteriorly toward the pubis. They stabilise position but do not produce the forward tilt.