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प्रश्न
Given below are the groups of certain substances of particular categories. Mention the category of each group and identify the wrong example giving reason.
Tears, skin, nasal secretion, HCl (in stomach)
एक पंक्ति में उत्तर
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उत्तर
Tears, skin, nasal secretion, HCl (in stomach)
Germ-killing secretions. Skin is a wrong example as it is a protective mechanical barrier and prevents the entry of germs in our body.
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