CATReading Comprehension > MediumThere are two kinds of molecules used to make some nano-robots: one that reacts positively to water and the other negatively.Nano-robots made from molecules that react to water have become increasingly usefulThe field of robotics is likely to be feature more and more in comics like the New X-Men.Once the stuff of science fiction, nano-robots now feature in cutting-edge scientific research✅ Correct Option: 4Related questions:CAT 2020 Slot 1From the passage it can be inferred that the call pulse rate of male northern elephant seals in the southern rookeries was faster because:CAT 2018 Slot 2Based on information provided in the passage, we can infer that, in addition to water ice, Saturn's rings might also have smallamounts of:CAT 2018 Slot 1In the first paragraph, the author uses "lie" to refer to the: