In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
Lacking physical strength due to illness or old age
Fickle means indecisive. Turgid means swollen. Vile means bad.
The only word that gives the intended meaning is Feeble.$
e.g. The old woman could not keep her feeble hands steady.
Therefore, the correct answer is option 4.