Withdrawal form rpf and investment in ppf

if the gross period of RPF contribution is less than five completed years, then there may be TDS deduction at the point of withdrawl,

whole the sum withdrawn would be added back to your income in the year of withdrawl.

if the period is more than five years, then no such impact

PPF contributions are seperate and distinguished u/s 80C, upto a maximum ceiling of 70000 per annum. 

I have a query regarding PPF deposits. I have been receiving confliciting response on this subject, request if someone can bring clarity on this.

My query is if I have a PPF account in my name as well as PPF account in the name of my minor son, which of the following statement will be correct?

1) I cannot deposit more than Rs. 1 lakh in one FY in both the PPF accounts taking together under any circumtances. OR

2) I can deposit Rs. 1 Lakh each in my account as well as my minor son's account (total 2 lakhs) but I wil get the 80C benefit for only Rs. 1 Lakh. Investment of Rs. 1 lakh in Minor son's account will be more of a non-taxable and non tax deductible investment to accumlate a kitty till he becomes major.

If statement at 2 above is correct, then will the interest income on additional 1 lakh deposited in PPF will still be tax free or will it require to be shown as 'income from other sources' since it is a non-qualifying investment.

Thanks in advance for your responses.