Seperate demat account & stock broking acount?

Is it good to open demat account seperate from the stock broking acount?

Plz Asnwer Friends 

For Example :-

Demat A/c at Angel Broking

&

Stock Broking A/c at zerodha/rksv/Tso/compositeedge

it is the other way round

Demat and Trading should be ideally with same broker.

though many of the discount brokers doesn't have their own DP

TradeSmartOnline has their own (DP)Depositary Participant and we can also avail (BSDA)Basic Service Demat Account.

To give you some finer cost related points of the BSDA. If a demat account has the value of securities, all the holdings in the demat account is less than Rs 50,000, then there is no annual maintenance charges (AMC) to be charged to that investor. So if he has a demat account with an holding of only Rs 20,000 in the form of stocks or any other investments, there will not be any AMC charged on that demat account.
If the value exceeds Rs 50,000 and goes up to Rs 2,00,000, then the charges are capped at Rs 100 per annum. Once the value of investments go above Rs 2,00,000, then you have to pay the charges as they are levied by the Depositary Participant (DP).
Interesting part is that existing demat account holders need not go and apply and open a new demat account under the BSDA. All they need to do is go to the DP and inform them that the value of their securities is less than Rs 50,000 or less than Rs 200,000 as the case maybe and they should be given the benefits of the preferential rates.

SOI=> indiansharebroker dot com/free-demat-account/