Maximum growth in human foetus occurs at the age of
A fetus or foetus is the unborn offspring of an animal that develops from an embryo. Following embryonic development the fetal stage of development takes place. In human prenatal development, fetal development begins from the ninth week after fertilisation or eleventh week gestational age and continues until birth. Prenatal development is a continuum, with no clear defining feature distinguishing an embryo from a fetus.
So, the correct option is ‘ Four months’.