Step 1: Garden suburbs originate from the Garden City idea, self-contained satellite townships built around parks and avenues (Statement I).
Step 2: Old, congested cities cannot be greened internally, so bio-aesthetic planning is pushed to vehicle-accessible suburbs on the outskirts (Statement II).
Step 3: Both statements describe the same planning concept from different angles.
Step 4: Both statements are true, so the answer is option (1).