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Solution


Q.

Fertilisation in humans is practically feasible only if                  [2016]
1 the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix  
2 the sperms are transported into cervix within 48 hrs of release of ovum in uterus  
3 the sperms are transported into vagina just after the release of ovum in fallopian tube  
4 the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube.  

Ans.

(4)

The fusion of a haploid male gamete (sperm) and a haploid female gamete (ovum) to form a diploid zygote is called fertilisation. In human beings, it takes place in the ampullary-isthmic junction of the oviduct (fallopian tube).