Pick which sentence is not logical.\nOptions:\n- Sentence A: "You must invest in a stock portfolio to have a secure retirement financially."\n- Sentence B: "You must invest in stock if you want to retire at all."\n
Please answer the following question by reasoning step-by-step.
Sentence B
Retiring and being financially secure does not require investing in a stock portfolio solely.

.

The final answer: Sentence B