Final answer:
The chair should be placed at the head of the bed on the resident's right side to provide better support for the transfer, utilizing the resident's stronger side.
Step-by-step explanation:
When assisting a resident with left-sided weakness to transfer from the bed to a chair, the chair should be positioned in such a way that it supports the resident's stronger side. Therefore, the correct position for the chair would be at the head of the bed, on the resident's right side. This location allows the resident to use their stronger right side to control the transfer, helping to prevent falls and ensure safety. The options provided in the question refer to anatomical positions which are not relevant to positioning furniture for patient transfers.