Step 1: Understanding the family tree.
The Pandavas are the sons of King Pandu, who ruled Hastinapura in the Mahabharata. Pandu had five sons: Yudhishthira, Bhima, Arjuna, Nakula, and Sahadeva, who are collectively known as the Pandavas.
Step 2: Analysis of other options.
• (A) Bhishma Pitamah: Bhishma was the granduncle of the Pandavas, not their father.
• (C) Dhritarashtra: Dhritarashtra was the blind king and the father of the Kauravas, not the Pandavas.
• (D) Shakuni: Shakuni was the maternal uncle of the Kauravas, not related to the Pandavas in terms of fatherhood.
Step 3: Conclusion.
Therefore, the correct answer is (B) Pandu, as the Pandavas are his sons.
Final Answer: Pandu.