#include &lt;iostream&gt;    #include &lt;list&gt;    using namespace std;    int main &#40;&#41;    &#123;        list&lt;int&gt; mylist;        list&lt;int&gt; :: iterator it1, it2;        for &#40;int i = 1; i &lt; 10; ++i&#41; mylist.push_back&#40;i * 1&#41;;            it1 = it2 = mylist.begin&#40;&#41;;        advance &#40;it2, 6&#41;;        ++it1;        it1 = mylist.erase &#40;it1&#41;;        it2 = mylist.erase &#40;it2&#41;;        ++it1;        --it2;        mylist.erase &#40;it1, it2&#41;;        for &#40;it1 = mylist.begin&#40;&#41;; it1 != mylist.end&#40;&#41;; ++it1&#41;            cout &lt;&lt; ' ' &lt;&lt; *it1;        return 0;    &#125;
A. 1 3 6
B. 8 9
C. Both a & b
D. None of the mentioned
Answer:A
#include &lt;iostream&gt;    #include &lt;list&gt;    using namespace std;    int main &#40;&#41;    &#123;        list&lt;int&gt; mylist;        list&lt;int&gt; :: iterator it1, it2;        for &#40;int i = 1; i &lt; 10; ++i&#41; mylist.push_back&#40;i * 1&#41;;            it1 = it2 = mylist.begin&#40;&#41;;        advance &#40;it2, 6&#41;;        ++it1;        it1 = mylist.erase &#40;it1&#41;;        it2 = mylist.erase &#40;it2&#41;;        ++it1;        --it2;        mylist.erase &#40;it1, it2&#41;;        for &#40;it1 = mylist.begin&#40;&#41;; it1 != mylist.end&#40;&#41;; ++it1&#41;            cout &lt;&lt; ' ' &lt;&lt; *it1;        return 0;    &#125;
A. 1 3 6 B. 8 9 C. Both a & b D. None of the mentioned
Explanation:In this program, We are comparing the values in both lists and erasing it according to certain condition.