An example of partial but sustained contraction is

A) treppe

B) tetany

C) a twitch.

D) fatigue

Answer:B) Tetany

Explanation: Tetany is the situation of spasm which get raised in the people having the low calcium level in the blood. It is a type of contraction that happen in the area of feet, hands, legs and sometimes lips, voice etc. The contraction or the cramp that appears is not in the voluntary form rather occurs at any moment of time unknowingly. Therefore, the correct option is option (b).