Entropy of the system decreases, when

Entropy of the system decreases, when Correct Answer Both B & C

Since, the degree of randomness decreases when the water is converted to ice the entropy decreases and also in an similar way when the gas is expanding from high pressure to low pressure the entropy increases.
Bissoy MCQ

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কোন এক পার্কের একটি দোলনায় ঝুলতে লোহার তার ব্যবহার করা হয়েছে। কয়েকজন ছেলে-মেয়ে দোলনায় যখন দোল খাচ্ছিল তখন এক বাচ্চার অভিভাবক লক্ষ্য করেন যে, ফুলন তার 1 m থেকে বৃদ্ধি পেয়ে 1.01 m হয়েছে এবং তারটির ব্যাস হ্রাস পেয়েছে। পয়সনের অনুপাত 0.2 হলে দোলনার তারের ব্যাস কতখানি হ্রাস পায় ? (The iron wires have been used in a park to swing. When some children are swinging, the length of the wire increases from I m to 1.01 m whereas the diameter of the wire decreases which is noticed by a guardian. If Poisson's ratio is 0.2, then how much the diameter of the wire decreases?) 
A system is said to be at equilibrium, if the entropy of the system has reached __________ value.
Entropy change for an irreversible process taking system and surrounding together is
For spontaneous changes in an isolated system (S = entropy)
The increase in entropy of a system represents
Increase in the entropy of a system represents the
Entropy is a measure of the __________ of a system.
Entropy, which is a measure of the disorder of a system is