Which of the following is not an allergen?

1. water
2. milk
3. perfume
4. dust

Diagnosis of an allergy cannot be done by

1. surgery
2. scratch test
3. blood test
4. skin test

Which of the following is caused due to pollen grains?

1. hay fever
2. insect bite
3. nettlerash
4. eczema

Which of the following is a long-term lung disease?

1. hay fever
2. insect bite
3. asthma
4. eczema