Which one of the following is a sequential electronic circuit that is

Which one of the following is a sequential electronic circuit that is used to store 1-bit information?

Register
Flip-flop
Counter
Accumulator
This question was previously asked in
UPSC CISF-AC-EXE – 2022
A flip-flop is a basic sequential logic circuit that has two stable states and can store one bit of binary information (0 or 1). It is the fundamental building block for memory elements in digital electronics.
Flip-flops are the elementary memory units in sequential circuits, capable of storing a single bit of data and changing state based on input signals and clock pulses.
A register is a collection of multiple flip-flops used to store a group of bits (e.g., a byte or a word). A counter is a sequential circuit that cycles through a sequence of states, often counting pulses, and is typically constructed using flip-flops. An accumulator is a type of register used in central processing units (CPUs) for performing arithmetic and logic operations.