Which of the following planets is known as its ring?

Which of the following planets is known as its ring?

مندرجہ ذیل میں سے کون سا سیارہ رینگ کے نام سے جانا جاتا ہے؟
Explanation

Ringed Planet is the nicked name for Saturn

Saturn is the second-largest planet

The largest moon of Saturn is Titan 

This planet is the least dense

Number of moons in Saturn: 83