$[3$pt$]$ Which one of the following assignment statement is correct?

Author: MK$,$ Editor$($s$)$: JFM

a$.7-1=$ my$\_$var

b$.7=$ my$\_$var $+1$

c$.$ my$\_$var $+1=7$

d$.$ my$\_$var $=7+1$

e$.$ print $($my$\_$var $=7$