Final answer:
The largest capsule size listed is size 000, which is larger than sizes 00, 0, and 1, following a numerical order where the larger the number, the smaller the capsule. Option number a is correct.
Step-by-step explanation:
The largest capsule size listed below is 000. When it comes to capsule sizes, the numbering system may seem counterintuitive — the larger the number, the smaller the capsule.
Therefore, among the given options (000, 00, 0, 1), the capsule size 000 is the largest option available. Capsule sizes are standardized and follow a numerical order where "000" is typically the largest, followed by "00", "0", and so on, with size "1" being smaller than the first three.