Step 1: Recall the rule book values:
A relay baton is a hollow tube made of wood, metal or another rigid material. Its measures are length 28-30 cm, circumference 12-13 cm and weight at least 50 g.
Step 2: Test each range against the rule:
A range is correct only if it matches the length limits. The ranges 25-30 cm, 30-35 cm and 35-40 cm all reach beyond the limits in one direction.
Step 3: Pick the match:
Only 28-30 cm sits exactly on the official limits.
Final Answer:
Baton length is 28-30 cm, so option 3.
\[\boxed{\text{Option 3}}\]