Question

nobody is older than my grandfather in my family

=>my grandfather is

Answer 1

nobody is older than my grandfather in my family

=>my grandfather is the oldest person in my family.

Answer 2

nobody is older than my grandfather in my family

 =>my grandfather is the oldest in my family.

Answer 3

Nobody is older than my grandfather in my family

⇒My grandfather is the oldest in my family.

Answer 4

nobody is older than my grandfather in my family =>my grandfather is the oldest person in my family.