Among the following sets of salient features, which set does not exclusively characterize mammals?

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Q: 95 (SSC/NA)
Among the following sets of salient features, which set does not exclusively characterize mammals?

question_subject: 

Science

question_exam: 

SSC

stats: 

0,2,11,7,2,2,2

keywords: 

{'mammals': [2, 0, 2, 2], 'salient features': [1, 0, 0, 0], 'sweat glands': [1, 0, 0, 0], 'mammary glands': [1, 0, 0, 0], 'sets': [4, 3, 5, 2], 'hairs': [2, 0, 1, 1], 'skin': [13, 1, 4, 4], 'presence': [5, 1, 0, 1]}

Option 1 includes characteristics that are exclusive to mammals. Mammals are the only group of animals that have sweat glands, hairs on their skin, and diphyodont teeth (having two sets of teeth in their lifetime).

Option 2 also includes features that are specific to mammals. Mammary glands, sweat glands, and a diaphragm are all unique to mammals. Mammary glands produce milk for feeding their young, sweat glands help regulate body temperature, and the diaphragm aids in breathing.

Option 4 is also correct as it includes mammary glands, which are found only in mammals. Additionally, mammals are the only group of animals that have hairs on their skin and a diaphragm.

Therefore, option 3 is the correct answer as it includes features that are not exclusively found in mammals. The presence of mammary glands, sweat glands, and a diaphragm characterizes mammals, not other groups of animals.