Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.

A. As in many other things, when nursing became necessary in life, Gandhiji learned it by the hard way of experience.

B. Where he picked up nursing was a mystery.

C. Gandhiji was a first-class nurse to the sick.

D. He certainly did not pass through a nursing school.