In the following sentence, a part of the sentence is underlined. Below are given alternatives to the underlined part, which may improve the sentence. Choose the correct alternative. In case no improvement is needed, choose the alternative that indicates 'No improvement'.
A patient's dangerous condition costs the doctors and nurses many a sleepless nights.
1
Many sleepless night
2
Too many a sleepless nights
3
A many sleepless night
4
Many a sleepless night
5
No Improvement