In the truth table formation, inputs are taken as A1A0 for A input and __________for B input.

A. A_{1}B_{1}

B. A_{0}B_{1}

C. B_{0}B_{1}

D. B_{1}B_{0}

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Answer: D

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**Explanation:**

In the truth table formation, the inputs are typically represented as binary values. If the inputs for A are denoted as A1A0 (a two-bit binary number where A1 is the most significant bit and A0 is the least significant bit), then it’s logical to denote the inputs for B in a similar manner, which would be B1B0. Therefore, the correct option is D. B1B0.