#include&lt;stdio.h&gt;    #include&lt;unistd.h&gt;&nbsp;    int main&#40;&#41;    &#123;        pid_t child;        int a, b;        a = 10;        b = 20;        child = fork&#40;&#41;;        a = a + b;        if&#40;child &gt; 0&#41;&#123;            printf&#40;&quot;%d\n&quot;,a&#41;;        &#125;         return 0;    &#125;
A. 10
B. 30
C. 50
D. none of the mentioned
Answer:A
#include&lt;stdio.h&gt;    #include&lt;unistd.h&gt;&nbsp;    int main&#40;&#41;    &#123;        pid_t child;        int a, b;        a = 10;        b = 20;        child = fork&#40;&#41;;        a = a + b;        if&#40;child &gt; 0&#41;&#123;            printf&#40;&quot;%d\n&quot;,a&#41;;        &#125;         return 0;    &#125;
A. 10 B. 30 C. 50 D. none of the mentioned
Explanation:None.