#include <bits/extc++.h>
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)

using std::cin;
using std::cout;
using std::min;
using std::vector;
using std::function;

int main() {
    int n, m, q;
    cin >> n >> m >> q;
    
    vector<vector<int>> to(n);
    rep(i, m) {
        int a, b;
        cin >> a >> b;
        --a; --b;
        to[a].push_back(b);
        to[b].push_back(a);
    }
    
    vector<int> ord(n, n);
    vector<int> low(n, n);
    dsu t(n);
    int id = 0;
    function<void(int, int)> tarjan = [&](int v, int p) {
        ord[v] = low[v] = id++;
        for (int u : to[v]) {
            if (u == p) continue;
            if (ord[u] == n) {
                tarjan(u, v);
                low[v] = min(low[v], low[u]);
                if (ord[v] < low[u]) {
                    t.merge(v, u);
                }
            }
            else {
                low[v] = min(low[v], ord[u]);
            }
        }
    };
    rep(i, n) { 
        if (ord[i] == n) tarjan(i, n);
    }
    
    rep(qi, q) {
        int a, b;
        cin >> a >> b;
        --a; --b;
        if (t.same(a, b)) puts("Yes");
        else puts("No");
    }
    
    return 0;
}