This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and Reproduction, Subject name: Physiology
In human, fertilization usually occurs in the 
Select and explain. 
A. Fimbriated end of uterine tube, B. Ampulla of the uterine tube, C. Isthmus of the uterine tube, D. Uterine cavity
B: Ampulla of the uterine tube
Answer: B: Ampulla of the uterine tube 
Explanation: B. i.e. (Ampulla of the uterine tube) (448 - Ganong) (423 - Ganong 23rd)* In humans Fertilization of the ovum by the sperm usually occurs in the ampulla of uterine tube** lined by ciliated columnar epithelium ** (AI - 09), occurs within few hours* Among 200- 300 million of sperms entering female genital tract only few thousand sperms reach the spot near the ovum and only one sperm fertilizes the ovum*** Implantation of the fertilized ovum occurs between 5-7 days after fertilization**.* Spermatogeneis occurs at temperature lower than core body temperature (AI- 09)