#include &lt;stdio.h&gt;     #include &lt;ctype.h&gt;    int main &#40;&#41;    &#123;        int i = 0;        char str&#91;&#93; = &quot;Steve Jobs\n&quot;;        char c;        while &#40;str&#91;i&#93;&#41;        &#123;            c = str&#91;i&#93;;            if &#40;islower&#40;c&#41;&#41;                 c = toupper&#40;c&#41;;            putchar &#40;c&#41;;            i++;        &#125;        return 0;    &#125;
A. Steve jobs
B. STEVE JOBS
C. Steve
D. None of the mentioned
Answer:A
#include &lt;stdio.h&gt;     #include &lt;ctype.h&gt;    int main &#40;&#41;    &#123;        int i = 0;        char str&#91;&#93; = &quot;Steve Jobs\n&quot;;        char c;        while &#40;str&#91;i&#93;&#41;        &#123;            c = str&#91;i&#93;;            if &#40;islower&#40;c&#41;&#41;                 c = toupper&#40;c&#41;;            putchar &#40;c&#41;;            i++;        &#125;        return 0;    &#125;
A. Steve jobs B. STEVE JOBS C. Steve D. None of the mentioned
Explanation:In this program, We have converted the lower case letters to uppercase letters by using toupper function.