Option A length = 300 cm, diameter = 3 mm
Option B length = 50 cm, diameter = 0.5 mm
Option C length = 100cm, diameter = 1 mm
Option D length = 200 cm, diameter = 2 mm
Solution
The correct option is Option B.
After making all the comparisons, the most appropriate choice is for ℓ = 50 cm & diameter = 0.5 mm