Question

The model of preamble of constitution written by Jawaharlal Nehru 

Answer 1

the preamble states:
WE, THE PEOPLE OF INDIA
SOCIALIST ,SECULAR , DEMOCRATIC
REPUBLIC
JUSTICE
LIBERTY
EQUALITY
FATERNITY

Answer 2

The draft of the Preamble was prepared by Jawaharlal Nehru and is based on the American model. The 42nd Amendment added the words ``Secular and Socialist'' and now the preamble reads as the first answer. 
Hope it helped you :)