What is most important for any startup company's growth: 1.Marketing 2.Finance 3.Human Resource or 4.Information Technology?

1 and 2 are most

all

Your customers and how to server them within your healthy cash flow.

Finance will be the healthy food for a new start up company, if we face financial problem in the beginning of the company we cannot survive in the market.
For any new company a good finance is foremost important then other tools.

i believe HR because if your sources are well trained to market the product then the company growth will be good.

as a start-up and entrepreneur i think Finance is the basic thing ,without it you cant sustain .
Human Resource & Information Technology is your core competency , if you are doing it wrong you will have a big failure.
once you have every thing done properly ,definitely you will need the marketing.
i would rather to say its a matter of balance-loading thing , each stage has its own requirements, and all of them are equally important.