The correct answer is: B. Shibu Soren.
Shibu Soren is the current President of the Jharkhand Party. He is a former Chief Minister of Jharkhand and has been a member of the Indian Parliament for several terms. He is a leader of the Santhal community and is known for his work for the rights of tribal people.
Vinod Bihari Mahto is the President of the All Jharkhand Students Union (AJSU). He is a former Minister in the Government of Jharkhand. He is a leader of the Kurmi community and is known for his work for the rights of backward castes.
Jaipal Singh was a freedom fighter and a leader of the Jharkhand movement. He was the first President of the Jharkhand Party. He died in 1982.
A. Vinod Bihari Mahto is incorrect because he is the President of the All Jharkhand Students Union (AJSU), not the Jharkhand Party.
B. Shibu Soren is correct because he is the current President of the Jharkhand Party.
C. Jaipal Singh is incorrect because he died in 1982 and is therefore not the current President of the Jharkhand Party.
D. Both (A) and (B) is incorrect because Vinod Bihari Mahto is not the President of the Jharkhand Party.