Bequest for a property to be given to someone after one's death

Q: "A" nominated the name of "BC" in immovable property during his life time at the society records, stating that after his death "BC" will be the owner of the immovable property, in the presence of his other legal heirs/family members and the other legal heirs knows the same, thereafter "A" died, whether the nominees "BC" will be the sole co-owners of the said immovable property or other legal heirs of the deceased will have right over the said property, as per Islam, Please answer.

Binary option trading

Q: Many people are going binary option nowadays to make money. Is it halaal to trade online through investment in binary options in the stock exchange. It basically is speculation whether or not a commodity will go up or down in the stock exchange. Nowadays the software purchased by yourself will do the speculation for you. Please advise whether this sort of earnings in halaal.

Dua after Durood in Salaah

Q: Is the following commonly recited dua after durood thabit?

اللهم اغفرلي و لوالدي و لأستاذي و لجميع المؤمنين و المؤمنات و المسلمين و المسلسلات برحمتك يا أرحم الراحمين