Answer:
the first one is B, the second one I believe to be D although I'm not 100% sure, hope this helps!
Both A and C are correct.
The sentence in which the underlined infinitive phrase functions as a subject is the last one - to quickly move large groups of people is the purpose of public transportation.
<em>To quickly move </em>is the infinitive phrase, and it is a subject.
Answer:
On his way to the fair the child sees toys, balloons of different colours, garland of gulmohur, a swing and a snake-charmer playing a flute. He gets attracted towards all these things.