For a two input AND gate, the four entries are shown in the truth table. Identify the correct ones out of these (A, B = input, $\mathrm{Y}=$ output) \begin{array}{|l|l|l|l|} \hline Entry & \mathrm{A} & \mathrm{B} & \mathrm{Y} \\ \hline 1 & 0 & 1 & 0 \\ \hline 2 & 1 & 0 & 0 \\ \hline 3 & 1 & 1 & 1 \\ \hline 4 & 0 & 0 & 1 \\ \hline \end{array}

• A

  1 and 2 only
• Correct answer
  B

  1,2 and 3 only
• C

  1, 3 and 4 only
• D

  2 , and 4 only

Hence, the correct answer is option: 'B'.