In Rum alcohol constitutes about 80% , most Gin have 50% alcohol , Brandy usually have 40% alcohol and the average alcohol content of wine is about 12%.
so, option-A is the correct answer.

Maximum percentage of alcohol present in the product of yeast fermentation

Introduction:
Yeast fermentation is a process by which yeast converts sugar into alcohol and carbon dioxide through anaerobic respiration. Yeast is a microorganism that is commonly used in the production of alcoholic beverages. Different alcoholic beverages have different alcohol percentages depending on the fermentation process and the type of yeast used.

Alcohol content in different beverages:
1. Rum: Rum is a distilled alcoholic beverage made from sugarcane byproducts such as molasses. The alcohol content in rum can vary, but it is typically around 40-50% alcohol by volume (ABV).

2. Gin: Gin is a distilled alcoholic beverage that is primarily flavored with juniper berries. The alcohol content in gin can vary, but it is typically around 37.5-50% ABV.

3. Brandy: Brandy is a distilled alcoholic beverage made from fermented fruit juice or wine. The alcohol content in brandy can vary, but it is typically around 35-60% ABV.

4. Wine: Wine is an alcoholic beverage made from fermented grape juice. The alcohol content in wine can vary widely depending on the type of wine. Generally, wine has an alcohol content ranging from 5-20% ABV. However, fortified wines such as Port or Sherry can have higher alcohol percentages, ranging from 17-20% ABV.

Conclusion:
From the given options, rum has the highest alcohol content percentage with an average range of 40-50% ABV. Therefore, the correct answer is option 'A' - Rum. However, it is important to note that the alcohol content in any beverage can vary depending on the brand, region, and production methods. It is always advisable to check the label or consult the manufacturer for accurate alcohol content information.