Morula reaches uterus at: (A) 3rd day after feilization, (B) 4th day after feilization, (C) 6th day after feilization, (D) 8th day after feilization
Answer is B. Morula is 16 cell structure and reaches uterus by 4th day of feilisation. Soon divisions occurs and blastocyst is formed which is 64 celled structure by day 6.