I have a brother who is 4 years elder to me, and a sister who was 5 years old when my brother was born. When my sister was born, my father was 24 years old. My mother was 27 years old when I was born. How old (in years) were my father and mother, respectively, when my brother was born?

Correct option is A

Given:
1. My brother is 4 years older than me. Let my age be "x" and my brother's age is "x + 4."
2. My sister was 5 years old when my brother was born. This means my sister is 5 years older than my brother. Therefore, my sister's age is "x + 4 + 5 = x + 9."
3. When my sister was born, my father was 24 years old. So, my father's age is "my sister's age + 24," which is "x + 9 + 24 = x + 33."
4. My mother was 27 years old when I was born. So, my mother's age is "my age + 27," which is "x + 27."
To Find:
The ages of my father and mother when my brother was born. When my brother was born, I was 4 years younger than him, i.e., "x - 4."
Solution:
1. Father's Age When My Brother Was Born: My father's age when I was "x" is "x + 33." When my brother was born (4 years earlier), my father's age was: "x + 33 - 4 = x + 29."
2. Mother's Age When My Brother Was Born: My mother's age when I was "x" is "x + 27." When my brother was born (4 years earlier), my mother's age was: "x + 27 - 4 = x + 23."
Final Answer:
The ages of my father and mother when my brother was born are 29 and 23, respectively.
Correct Option: (a) 29 and 23.