Logical Problems - Verbal and Reasoning

Directions to SolveEach problem consists of three statements. Based on the first two statements, the third statement may be true, false, or uncertain.
Q1:

Joe is younger than Kathy.
Mark was born after Joe.
Kathy is older than Mark.
If the first two statements are true, the third statement is

A true

B false

C uncertain

ANS:A - true

Explanation: Joe is younger than Kathy and older than Mark, so Mark must be younger than Kathy.