MCQ
For how many days occurs bleeding during menstrual cycle?
- A10-15 days
- B3-5 days
- C20-25 days
- DNone of these
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$(a)$ The cattle egret and grazing cattle
$(b)$ Barnacle balanus and Barnacle chathamalus
$(c)$ Goat and Abingdon turtle from Galapagosisland
$(d)$ Barnacles growing on the back of whale