CTET 2 Math and Science 21 Dec 2021 Paper

AB is a line and a point O lies on it. A ray OC is drawn taking a point C not lying on line AB.
Then, which of the following statement(s) is/are true?
(a) ∠AOC and ∠BOC form a linear pair.
(b) ∠AOB and ∠BOC are adjacent angles.