Question

which of the weed has become a major cause of pollen allergy
in India​

Answer 1

Parthenium which is commonly known as carrot grass or congress weed belongs to family Asteraceae come to India from the USA during 1950s famine mixed with the imported wheat and become a major weed plant as well a major cause of pollen allergy in India

Answer 2

Answer:

Parthenium is the weed that cause pollen energy