In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. 

We have all ___(1)___ an old saying “a friend in need is a friend indeed”. A real or true friend is always __(2)___ to help us when we need them. At the same time, it is our ___(3)___ to remain helpful towards our friends. This proverb means that ‘a friend who helps his friend in __(4)____ is a real friend’. The proverb could be taken to mean that ‘friends __(5)____ on each other’. If someone is our friend, we should be glad to help them when they need us. And we can assume that this sentiment is reciprocal. That is what true friendship is about.