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Question

What will be the value stored in arr[5] when the following code is executed?
#include<stdio.h>
int cat_number(int n)
{
     int i,j,arr[n],k;
     arr[0] = 1;
     for(i = 1; i < n; i++)
     {
         arr[i] = 0;
         for(j = 0,k = i - 1; j < i; j++,k--)
          arr[i] += arr[j] * arr[k];
     }
     return arr[n-1];
}
int main()
{
     int ans, n = 10;
     ans = cat_number(n);
     printf("%d\n",ans);
     return 0;
}

a.

14

b.

42

c.

132

d.

429

Answer: (b).42

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Q. What will be the value stored in arr[5] when the following code is executed?

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