1.

Which of the following sequences are unaccepted in C language?

A. <pre class="prettyprint lang-c">#if<br> #undef<br> #endif<br></pre>
B. <pre class="prettyprint lang-c">#if<br> #else<br> #endif<br></pre>
C. <pre class="prettyprint lang-c">#if<br> #elif<br> #endif<br></pre>
D. <pre class="prettyprint lang-c"> #if<br> #if<br> #endif<br></pre>
E. None of these
Answer» E. None of these


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