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:

All Lamels are Signots with buttons.
No yellow Signots have buttons.
No Lamels are yellow.
If the first two statements are true, the third statement is

A true

B false

C uncertain

ANS:A - true

Explanation: We know that there are Signots with buttons, or Lamels, and that there are yellow Signots, which have no buttons. Therefore, Lamels do not have buttons and cannot be yellow.