As per my experience, good and emphatic facts play important role in getting good marks.Especially, if introduction starts with some scincillating fact , 1-2 marks extra is sure.
1. question related to pradhan mantri awas yojna can starts with fact like
Even aftet 70 years of independece over 1 and half million population is without home.
2.question related to need for employment generation can start with " As per UN report by 2050 working age population is going to be more than 1 billion. " Or Economic survey says by 2020 india will reach peak of demographic dividend"etc.
Facts must be emphatic and powerful so that it has impact.
Ex. Still 60% of population lives in rural area.
Or, three-quarter of energy needs are still fullfilled by fossil fuels.
This can easily help you get extra 10-15 marks as good start also help to maintain a good flow and save time in thinking intro.
Lets make a repository.