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For subtracting 1 from 0, we use to take a _______ from neighbouring bits.

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For subtracting 1 from 0, we use to take a _______ from neighbouring bits.

(a) Carry

(b) Borrow

(c) Input

(d) Output

The question was asked in an interview for internship.

My doubt is from Half & Full Subtractor topic in chapter Arithmetic Circuits of Digital Circuits

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Right answer is (b) Borrow

To explain I would say: For subtracting 1 from 0, we use to take a borrow from neighbouring bits because carry is taken into consideration during addition process.

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