Four sentences in the form of P, Q, R and S are given below which are not arranged chronologically. Select the option in which they are arranged chronologically.

P. He was an Afgan by birth and he was born in Sasaram, Bihar.

Q. Since childhood, he was strong and determined and was named 'Sher' because he once killed a tiger with bare hands.

R. The rise of Sher Shah Suri is one of the most interesting stories in the history of Medieval India.

S. He defeated the famous Mughal ruler Humayun in two battles and thereafter established the Suri kingdom.