class Graph():
    def __init__(self,size,directed=False):
        self.dir=directed
        self.size=size
        self.gr=[[] for i in range(size)]
        self.edges=[]
    
    def add_edge(self,u,v,status={}):
        self.gr[u].append(self.Edge(u,v,status))
        if not(self.dir):
            self.gr[v].append(self.Edge(v,u,status))
        self.edges.append(self.Edge(u,v,status))

    def node(self,v):
        return self.gr[v]
    
    class Edge():
        def __init__(self,st,to,status):
            self.st=st
            self.to=to
            self.status=status
        
        def __getitem__(self,val):
            return self.status[val]

from collections import deque
def bridge(gr):
    pre=[-1]*gr.size
    low=[-1]*gr.size
    ret=[]
    for i in range(gr.size):
        if pre[i]!=-1:
            continue
        vert=deque([[0,i,-1,-1]])
        cnt=0
        while len(vert)>0:
            step,now,bef,ed=vert[-1]
            if step==1:
                for j in gr.node(now):
                    if j.to!=bef:
                        low[now]=min(low[now],low[j.to])
                if ed!=-1 and pre[now]<=low[now]:
                    ret.append(gr.node(bef)[ed])
                vert.pop()
                continue
            if pre[now]!=-1:
                low[bef]=min(low[bef],low[now])
                vert.pop()
                continue
            pre[now]=cnt
            low[now]=cnt
            cnt+=1
            vert[-1][0]=1
            for j,k in enumerate(gr.node(now)):
                if k.to==bef:
                    continue
                if low[k.to]==-1:
                    vert.append([0,k.to,now,j])
                else:
                    low[now]=min(low[now],low[k.to])
    return ret

class UnionFind():
    def __init__(self,size):
        self.uf=[[-1,0,1] for i in range(size)]
        
    def unite(self,fir,sec):
        one=self.root(fir)
        two=self.root(sec)
        if one!=two:
            if self.uf[one][1]>self.uf[two][1]:
                one,two=two,one
            self.uf[one][0]=two
            self.uf[two][2]+=self.uf[one][2]
            if self.uf[one][1]==self.uf[two][1]:
                self.uf[two][1]+=1
    
    def same(self,fir,sec):
        return self.root(fir)==self.root(sec)
    
    def root(self,node):
        pos=node
        change=[]
        while self.uf[pos][0]!=-1:
            change.append(pos)
            pos=self.uf[pos][0]
        for i in change:
            self.uf[i][0]=pos
        return pos
    
    def size(self,node):
        return self.uf[self.root(node)][2]

N,M,Q=map(int,input().split())
namori=Graph(N)
for i in range(M):
    u,v=map(int,input().split())
    namori.add_edge(u-1,v-1)
union=UnionFind(N)
for i in bridge(namori):
    union.unite(i.st,i.to)
for i in range(Q):
    x,y=map(int,input().split())
    if union.same(x-1,y-1):
        print("Yes")
    else:
        print("No")