Question

Q3. Helium ( in helium and oxygen mixture )finds its use in treatment of respiratory ailments to
treat conditions like asthma because
i) of its inert nature
ii) low density that reduces airway resistance and promotes airflow through the lungs
iii) is pure as compared to air which is a mixture
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 1,2 and 3​

Answer 1

Answer:

my answer is option A(1 and 2)