When Rahul was born, his father was 26 years older than his brother and his mother was 23 years older than his sister. If Rahul's brother is 4 years older than him and his mother is 3 years younger than his father, how old was Rahul's sister when he was born ?
Choose the correct choice from the following options:
A) 7 years	B) 5 years	C) 4 years	D) 6 years	E) 8 years
When Rahul was born, his brother's age = 4 years; his father's age = (4 + 26)= 
<gadget id="calculator">(4 + 26)</gadget>
<output>30</output>
30 years,   his mother's age= (30 - 3)= 
<gadget id="calculator">(30 - 3)</gadget>
<output>27</output>
27 years;   his sister's age= (27 - 23)= 
<gadget id="calculator">(27 - 23)</gadget>
<output>4</output>
4 years.   Answer: Option 4 years
<result>C</result>
When Rahul was born, his father was 26 years older than his brother and his mother was 23 years older than his sister. If Rahul's brother is 4 years older than him and his mother is 3 years younger than his father, how old was Rahul's sister when he was born ?