It is necessary for you to pay the Zakah of all the gold that you have. In case of buying gold for your daughters, if you keep it in your possession, you will have to pay its Zakah and if you give it in the possession of your daughters, they will have to pay its Zakah. In the same way, you will have to pay the Zakah of the amount deposited in the bank or in the name of LIC except the interest amount. Whatever capital amount you have deposited, calculate it and pay its Zakah as 2.5% when one year passes over it. When the PF amount will come into your possession, pay its Zakah in the same way.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband