Which of the following wave functions does not represent a travelling wave ?

Which of the following function represent a travelling wave? Here a,b and c are constant.

Which of the following function represent a travelling wave? Here a,b and c are constant.

Which of the following equation does not represent the progressive wave -

which of the following function corrtly represent the traveling wave equation for finite values of x and t ?

which of the following function corrtly represent the traveling wave equation for finite values of x and t ?

which of the following function corrtly represent the traveling wave equation for finite values of x and t ?

Which one of the following does not represent a travelling wave?