The correct option is B uterus
In vitro fertilisation (IVF) followed by embryo transfer is also called the test tube baby programme.
In this technique, ova from the female and sperm from male are collected and induced to form zygote in the laboratory.
The zygote or early embryo (with upto 8 blastomeres) is transferred into the fallopian tube.
The embryo with more than 16 blastomeres is transferred into the uterus and this is called IUT (intra uterine transfer).
Option B is the correct answer.