Step 1: Understanding the Concept:
This problem involves the interpretation of a transfer under the Transfer of Property Act, 1882. It deals with a life estate followed by a remainder interest given to two persons with a condition of survivorship. The key is to determine the nature of the interest created for C and D.
Step 2: Detailed Explanation:
1. A creates a life interest in favour of B. This means B can enjoy the property for his lifetime.
2. After B's death, the property is to go to C and D, but with a crucial condition: "or to the survivor of them." This phrase creates a contingent interest under Section 24 of the Transfer of Property Act.
3. The interest for C and D is contingent upon them surviving the life-tenant, B. The property is to be taken by them only if they are alive at the time of B's death.
4. The problem states that C dies during B's lifetime. Therefore, C did not fulfill the condition of surviving B. C's potential interest is extinguished upon his death.
5. D, however, survives B. D has fulfilled the condition.
6. Therefore, upon B's death, the entire property passes to the sole survivor, D.
Step 3: Final Answer:
At B's death, the property passes entirely to D, who is the survivor.