Assertion (A): The expression "HELLO".sort() in Python will give an error.
Reason (R): sort() does not exist as a method/function for strings in Python.
Mark the correct choice:
The sort() method is not defined for string objects in Python. It is used for lists, not strings. Therefore, trying to use sort() on a string object like "HELLO" results in an AttributeError, making both the assertion and reasoning true, with (R) correctly explaining (A).

A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:
(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?