economic environment

Which TWO of the following statements are correct?
1 Securitisation is the conversion of illiquid assets into marketable securities
2 The reverse yield gap refers to equity yields being higher than debt yields
3 Disintermediation arises where borrowers deal directly with lending individuals
4 Demand-pull inflation will occur when there are increases in production costs
independent to the state of demand

dear sir

the above question is from kaplan , and i have problems in understanding the first statement and the third statement .

thank you sir