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                              Q:
                           
                           
                                                      | A) sebaceous glands of mammals | B) salivary glands of vertebrates | 
| C) stings of rays | D) electric organs of fishes | 
                              Answer:   B) salivary glands of vertebrates  
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
Here Homologous Means having the same relation or relative position or structure.
Here in snakes poison is in glands and here salivary glands are in Vertebrates.
 
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