1.

1). Princess2). Postulate3). Principle4). Principal

Answer»

The correct answer to the QUESTION would be 'principle' which means a fundamental truth or proposition that serves as the foundation for a system of belief or behaviour or for a chain of REASONING.$

The other words mean:$

Princess - the daughter of a monarch.$

Postulate - suggest or assume the existence, fact, or truth of (SOMETHING) as a basis for reasoning, discussion, or belief.$

Principal - first in order of IMPORTANCE; main.$



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