Suppose I$\text{'}$m thinking of naming a variable classStartTime. I want it to be seen as a constant and store the value of $6$:$00$p$.$m$.$ Which of the following is the correct way to format it$?$

Suppose I$\text{'}$m thinking of naming a variable classStartTime. I want it to be seen as a constant and store the value of $6$:$00$p$.$m$.$ Which of the following is the correct way to format it$?$

class$\_$Start$\_$Time$="6$:$00$p$.$m$."$

classStartTime$=6$:$00$p$.$m$.$

classStartTime$="6$:$00$p$.$m$."$

$\_$classStartTime$="6$:$00$p$.$m$."$

CLASS$\_$START$\_$TIME$="6$:$00$p$.$m$."$