How many smells can most humans distinguish?
10,000
1,000
100,000
100

Humans can distinguish more than 1 trillion scents, according to new research. The findings show that our sense of smell is far more discriminating than previously thought. When you stroll through a garden, you may notice several shades of golden daffodils and recognize the chirping of several types of birds.

10,000

Explanation:

The human nose has roughly 400 types of scent receptors that can detect at least 1 trillion different odours. The human nose can distinguish at least 1 trillion different odours, a resolution orders of magnitude beyond the previous estimate of just 10,000 scents

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