Option 1: Sea Island. Sea Island cotton is a highly prized variety known for its long and silky fibers. However, it is not considered the best variety in the world.

Option 2: Upland American. Upland American cotton is the most commonly grown variety in the United States. While it is a good quality cotton, it may not be considered the best worldwide.

Option 3: Egyptian. Egyptian cotton is renowned for its superior quality, long and fine fibers, and high absorbency. It is often regarded as one of the best varieties of cotton in the world.

Option 4: Short staple Indian. Short staple Indian cotton refers to cotton varieties with short fibers. Although India is a major producer of cotton, short staple cotton is not typically considered the best in terms of quality.

The correct answer is Option 3: Egyptian.