Explanation:

- Street cobblers in towns: They are typically associated with urban settings and may not fall under the category of rural poor.

- Landless agricultural labourer: These individuals work in rural areas without owning land, making them part of the rural poor due to their unstable income and lack of assets.

- Small land holding cultivators: Despite owning some land, these farmers often face economic hardships and thus can also be classified as rural poor.

- Both b and C: Combines the last two categories, both of which are legitimate examples of rural poor.

Answer: Both b and C