![Two steam engines A and B have their sources at 600C and 400C and their sinks at 300C and 200C respectively](https://www.gkseries.com/blog/wp-content/uploads/2022/04/Two-steam-engines-A-and-B-have-their-sources-at-600C-and-400C-and-their-sinks-at-300C-and-200C-respectively-.png)
Q. Two steam engines A and B have their sources at 600C and 400C and their sinks at 300C and 200C respectively :
A. They are equially efficient
B. A is more efficient than B
C. B is more efficient than A
D. none of these
Answer: A is more efficient than B