Answer: conversion ratio.

**Explanation:** The correct answer is **A (conversion ratio)** because it represents the number of common shares each convertible bond can be converted into. - **B (conversion price)** is incorrect as it denotes the price per share at which the convertible bond can be converted into shares. - **C (conversion value)** is incorrect because it refers to the current market value of the shares obtained upon conversion, calculated as the current share price multiplied by the conversion ratio. This question tests understanding of key terms related to convertible bonds in fixed-income securities.

Author: LeetQuiz Editorial Team