import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)
INF = float("INF")
MOD = 10 ** 9 + 7
MOD2 = 998244353
from heapq import heappop, heappush
import math
from collections import Counter, deque
from itertools import accumulate, combinations, combinations_with_replacement, permutations
from bisect import bisect_left, bisect_right
import decimal

n, m, q = map(int, input().split())
edge = [[] for _ in range(n)]

for i in range(m):
    u, v = map(int, input().split())
    u, v = u - 1, v - 1
    edge[u].append(v)
    edge[v].append(u)

ord = [-1] * n
low = [-1] * n
cnt = 0

def dfs(i, p):
    global cnt
    ord[i] = cnt
    cnt += 1
    low[i] = ord[i]
    for to in edge[i]:
        if to == p:
            continue
        if ord[to] != -1:
            low[i] = min(low[i], ord[to])
            continue
        dfs(to, i)
        low[i] = min(low[i], low[to])

dfs(0, -1)

def is_bridge(i, j):
    if ord[i] < low[j]:
        return True
    return False

edge2 = [[] for _ in range(n)]
for i in range(n):
    for j in edge[i]:
        if is_bridge(i, j):
            edge2[i].append(j)

seen = [-1] * n
for i in range(n):
    if seen[i] != -1:
        continue
    seen[i] = i
    que = deque()
    que.append(i)
    while que:
        x = que.popleft()
        for to in edge2[x]:
            if seen[to] != -1:
                continue
            seen[to] = seen[x]
            que.append(to)

for i in range(q):
    x, y = map(int, input().split())
    x, y = x - 1, y - 1
    if seen[x] != seen[y]:
        print("No")
    else:
        print("Yes")