Josh gratuitously transferred ownership of his personal residence to his son when it was valued at $$350,000.$ ?However, Josh retained the right to live in the house until his death. The value of this retained interest was $$150,000.$ ?Two years before his death, Josh relinquished his right to live in the house. When Josh died the house was valued at $$400,000.$ ?Which of the following statements is correct?

When Josh dies the value of the retained interest, $$150,000,$ ?must be included in his gross estate.

When Josh dies no part of the house is included in his gross estate.

When Josh dies the entire value of the house at his death, $$400,000,$ ?must be included in his gross estate.

When Josh dies the value of the house at the time of the gift, $$350,000,$ ?must be included in his gross estate.

None of the above.