A father tells his son, "I was one year more than your present age when you were born. If the father is 37 year now, How Old was his son 5 year ago? एक पिता अपने पुत्र से कहता है ‘‘मै तुम्हारी वर्तमान आयु से एक वर्ष अधिक था जब तुम्हारा जन्म हुआ था। यदि पिता की वर्तमान आयु’’ 37 वर्ष है तो पाँच वर्ष पहले उसके पुत्र की आयु क्या थी?

Let son's current age be x years. When the son was born (x years ago), the father's age was (x+1) years as stated. Father's current age would be (x+1) + x = 37 years. Solving: 2x + 1 = 37, so 2x = 36 and x = 18. The son is currently 18 years old, so 5 years ago, he was 18 - 5 = 13 years old. Option B (13) is correct. Options A, C, and D don't satisfy the given condition.