Aditi was unable (a)/to support her parent (b)/even though both of them(c)/had no income of their own (d)/No error (e)

https://things-for-students.blogspot.com/2022/04/aditi-was-unable-ato-support-her-parent.html
Aditi was unable (a)/to support her parent (b)/even though both of them(c)/had no income of their own (d)/No error (e) 1.(a) 2.(b) 3.(c) 4.(d) Correct Answer: b [“parents” should be used in place of “parent”]