Consider the following recursive implementation to find the nth fibonacci number:Which of the following lines should be inserted to complete thebelow code?

• A. fibo(n – 1)
• B. fibo(n – 1) + fibo(n – 2)
• C. fibo(n) + fibo(n – 1)
• D. fibo(n – 2) + fibo(n – 1)