#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353; //1000000007;
using ll=long long;
using pp=pair<int,int>;
#define sr string 
#define vc vector
#define fi first
#define se second
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define pque priority_queue
#define bpc(a) __builtin_popcount(a)
int main(){
  int n,m,qq;cin>>n>>m>>qq;
  vc v(n,vc<int>(0));
  rep(i,m){
    int a,b;cin>>a>>b; a--;b--;
    v[a].pb(b); v[b].pb(a);
  }
  vc<int>d(n); rep(i,n)d[i]=v[i].size();
  queue<int>q; rep(i,n)if(d[i]==1)q.push(i);
  dsu ds(n); vc<bool>bo(n,true);
  while(q.size()){
    int a=q.front(); q.pop();
    bo[a]=false;
    for(auto au:v[a])if(bo[au]){
      d[au]--; 
      ds.merge(a,au);
      if(d[au]==1)q.push(au);
    }
  }
  rep(z,qq){
    int a,b;cin>>a>>b; a--;b--;
    if(ds.same(a,b))cout<<"Yes";
    else cout<<"No";
    cout<<"\n";
  }
}