Answer:
Option C cooking oil is not heterogenous mixture
Step-by-step explanation:
Mixture is a combination more than two substances and are not chemically combined.
It is of two types Homogenous mixture and heterogenous mixture
Homo means “same”.
Hetero means” different”
Homogenous mixture is a mixture which looks uniform throughout
Examples Cheese, salt solution, air, 18 carat gold
Heterogenous mixture is a mixture which looks non uniform throughout
.Examples Pizza, trail mix, salad, A mixture of oil and water