The correct answer is option ($4$) as uterine fundus is the upper, dome-shaped part of the uterus, above the opening of fallopian tubes.

– Option ($1$) is incorrect as isthmus is the last and narrow part of the oviduct that links to the uterus.

– Option ($2$) is incorrect as infundibulum is the part of oviduct which is closer to the ovary.

– Option ($3$) is incorrect as ampulla is the wider part of the oviduct.