#include &lt;stdio.h&gt;    #include &lt;ctype.h&gt;    int main&#40;&#41;    &#123;        char c = 't';        printf&#40;&quot;is :%c\n&quot;, tolower&#40;'A'&#41;&#41;;    &#125;
A. A
B. a
C. Non-zero number
D. Zero
Answer:A
#include &lt;stdio.h&gt;    #include &lt;ctype.h&gt;    int main&#40;&#41;    &#123;        char c = 't';        printf&#40;&quot;is :%c\n&quot;, tolower&#40;'A'&#41;&#41;;    &#125;
A. A B. a C. Non-zero number D. Zero