In India, What is the maximum amount of cash that an individual can keep with him legally?

In India, What is the maximum amount of cash that an individual can keep with him legally without paying any tax?? I am salaried and have paid income tax. Over the years, i have got back the personal loans given to friends and relatives and it is in cash…Do i need to give tax for that amount again?? Or else, is there any governement regulation on maximum amount of hard cash(currency) that an individual can keep with him ( Not in a bank)??

Documents to keep on house property sale?

On closing the deal on selling my house property, what documents should I keep regarding the transaction? Should they be originals and certified or are photocopies OK? The implications I am looking are as proof for tax filing as well as proof of transaction. Do I need some document on what all cheques were received.

Would the property dealer provide these documents automatically or I need to ask for them.
This question is specific to Indian context around Noida.

Pls advise me some mutual funds to keep in portfolio ?

I want to build a good MF portfolio.. My age is 28 years.. I am married and have one newborn child.. Please suggest me some good mutual funds. to invest in SIP. I am planning to invest 5-6 thousand per month. So advise me some mutual funds.. Should I ivest in Equity funds.. or Balance funds or Index funds or Conservative funds or in all , if mix of all in what ratio should i invest and suggest some good names…
I am from India.. so Need mutual funds available in Indian market…