Property transfer as per Registered Will

My father had made a registered will for his self acquired property in Chandigarh. As per will he stated that: 1. Ground floor of this property shall be inherited by his Son A. 2. First floor of this property shall be inherited by his Son B. He shall not be entitled to dispose it of but shall be entitled to live in it. 3. Second floor of this property shall be inherited by his Daughter C and his grandson D (i.e. Son of Son A) in equal share. They shall be fully entitled to it. After death of his Daughter C, his grandson D shall own/posses/acquire/inherit whole second floor of this property. My father has only these three children i.e. Son A, Son B & Daughter C. Now after death of my father and mother, we want to transfer this property on our name. But I have few question regarding this: 1. After transfer of property on their names, can Daughter C transfer/inherit her share to her legal heirs/third person or sell her share. 2. After transfer of property on their names, can Son B transfer/inherit his share to his legal heirs. And whether his legal heirs are entitled to sell/transfer their inherited share. 3. As property is yet to be transferred in names of beneficiaries as per WILL, Is there any legal way to negate/nullify clause of Son B that he shall not be entitled to dispose it of and Daughter C can have full rights of her share so that she can transfer her share to her legal heirs or sell of her share. 4. As per recent Punjab and Haryana Court Ruling, floor wise sale of property in Chandigarh shall not be recognized and only share can be transferred. Now, how % share of above mentioned property will be distributed among Son A, Son B, Daughter C and Grandson D (as WILL entitles them with floor not share%).