MCQ

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In Boolean algebra, $Y = A + B$ implies that:

• ✓
  Output $Y$ exists when both inputs $A$ and $B$ exist.
• B
  Output $Y$ exists when either input $A$ exists or input $B$ exists or both inputs $A$ and $B$ exist.
• C
  Output $Y$ exists when either input $A$ exists or input $B$ exists but not when both inputs $A$ and $B$ exist.
• D
  Output $Y$ exists when both inputs $A$ and $B$ exists but not when either input $A$ or $B$ exist.