Q1:

S₁: Jawaharlal Nehru was the greatest plan-enthusiast.

P : Under Nehru's advice, the pre-Independent congress set up National Planning Commission in 1938.

Q : But he forgot that what could be achieved by force under the communist dictatorship of Russia was not possible under the democratic set up of India.

R : He took the idea from Russia where Five year plans transformed a very backward country into a top power of the world.

S : No free government can call for compulsory sacrifice and suffering from the whole people.

S₆: Nehru himself became the chairman of the commission.

The Proper sequence should be:

Question

S₁:	Jawaharlal Nehru was the greatest plan-enthusiast.
P :	Under Nehru's advice, the pre-Independent congress set up National Planning Commission in 1938.
Q :	But he forgot that what could be achieved by force under the communist dictatorship of Russia was not possible under the democratic set up of India.
R :	He took the idea from Russia where Five year plans transformed a very backward country into a top power of the world.
S :	No free government can call for compulsory sacrifice and suffering from the whole people.
S₆:	Nehru himself became the chairman of the commission.

The Proper sequence should be:

Ordering of Sentences