Given the rationale, provide a reasonable question and answer. Step-by-step reasoning process: Retiring and being financially secure does not require investing in a stock portfolio solely.
The question and answer:
Pick which sentence is not logical.
Options:
- Sentence A: "You must invest in a stock portfolio to have a secure retirement financially."
- Sentence B: "You must invest in stock if you want to retire at all."

The answer is Sentence B