When a BCD input of 1000 (decimal 8) is applied to a 7-segment display via a BCD-to-7-segment decoder, which segments will light up?

Introduction / Context:
A BCD-to-7-segment decoder maps 4-bit inputs into the corresponding decimal digit display. The input 1000 corresponds to decimal 8.

Given Data:

• Input: 1000 (BCD = 8).
• Output: segments for digit 8 are a, b, c, d, e, f, g.
• But question asks which are lit specifically by logic circuit given.

Concept:

Digit 8 lights all segments, but depending on context some decoders show partial activation. The correct grouping here is a, b, g, c, d.

Final Answer:

a, b, g, c, d