The sets A and B have same cardinality if and only if there is ___________ from A to B.
(a) One-to-one
(b) One-to-many
(c) Many-to-many
(d) Many-to-one
I had been asked this question in an internship interview.
My doubt is from Sequences and Summations topic in portion Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics