Select the option that can be used as a one-word substitute for the given group of words.

Weakness and poor health

Frailty

The option that can be used as a one-word substitute for the given group of words "Weakness and poor health" is: Frailty

1. Geniality: This word refers to a friendly and cheerful disposition or manner. It does not directly relate to weakness and poor health, so it is not the correct option.

2. Hospitality: This word refers to the friendly and generous reception and entertainment of guests, visitors, or strangers. It also does not directly relate to weakness and poor health, so it is not the correct option.

3. Frailty: This word refers to the condition of being weak, delicate, or fragile, especially due to poor health or old age. It directly relates to the given group of words, as it specifically denotes weakness and poor health. Therefore, "Frailty" is the correct one-word substitute for the given group of words.

4. Obscurity: This word refers to the state of being unknown, inconspicuous, or unimportant. It does not relate to physical weakness or poor health, so it is not the correct option.

Therefore, "Frailty" accurately represents the idea of weakness and poor health, making it the most suitable one-word substitute for the given group of words.