#include &lt;iostream&gt;    #include &lt;algorithm&gt;    #include &lt;vector&gt;    using namespace std;    bool myfunction &#40;int i,int j&#41;     &#123;        return &#40;i &lt; j&#41;;    &#125;    int main &#40;&#41;     &#123;        int myints&#91;&#93; = &#123;9, 8, 7, 6&#125;;        vector&lt;int&gt; myvector &#40;myints, myints + 4&#41;;        partial_sort &#40;myvector.begin&#40;&#41;, myvector.begin&#40;&#41; + 2, myvector.end&#40;&#41;&#41;;        partial_sort &#40;myvector.begin&#40;&#41;, myvector.begin&#40;&#41; + 2, myvector.end&#40;&#41;,        myfunction&#41;;        for &#40;vector&lt;int&gt; :: iterator it = myvector.begin&#40;&#41;; it != myvector.end&#40;&#41;; ++it&#41;            cout &lt;&lt; ' ' &lt;&lt; *it;        return 0;    &#125;
A. 6 7 8 9
B. 9 8 6 7
C. 6 7 9 8
D. None of the mentioned
Answer:A
#include &lt;iostream&gt;    #include &lt;algorithm&gt;    #include &lt;vector&gt;    using namespace std;    bool myfunction &#40;int i,int j&#41;     &#123;        return &#40;i &lt; j&#41;;    &#125;    int main &#40;&#41;     &#123;        int myints&#91;&#93; = &#123;9, 8, 7, 6&#125;;        vector&lt;int&gt; myvector &#40;myints, myints + 4&#41;;        partial_sort &#40;myvector.begin&#40;&#41;, myvector.begin&#40;&#41; + 2, myvector.end&#40;&#41;&#41;;        partial_sort &#40;myvector.begin&#40;&#41;, myvector.begin&#40;&#41; + 2, myvector.end&#40;&#41;,        myfunction&#41;;        for &#40;vector&lt;int&gt; :: iterator it = myvector.begin&#40;&#41;; it != myvector.end&#40;&#41;; ++it&#41;            cout &lt;&lt; ' ' &lt;&lt; *it;        return 0;    &#125;
A. 6 7 8 9 B. 9 8 6 7 C. 6 7 9 8 D. None of the mentioned
Explanation:In this program, We are partial sorting the vector by using the partial sort method.