CTET Class I to V 28 Dec 2021 Paper

Concept maps are commonly used in mathematics teaching.
Which of the given statements are true about concept maps?
(a) It is a complex network depicting the relationship between all the subconcepts of the concept.
(b) It is a linear arrangement of all the subconcepts of the concept.
(c) They can be used as diagnostic tools to identify difficulties in learning that students are facing.
(d) They help a teacher to gain new insights into the nature of mathematics.
Choose the correct option