Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: In the elderly the total body water: 
 Options:  <1> It is half that in the adult. <2> It decreases fundamentally at the expense of the intravascular compartment. <3> It decreases mainly due to the reduction of extracellular fluid. <4> It decreases greatly as a result of the loss of muscle mass. <5> It represents 30% of body weight.
