import ____________  # statement 1
rec = []
while True:
    rn = int(input("Enter"))
    nm = input("Enter")
    temp = [rn, nm]
    rec.append(temp)
    ch = input("Enter choice (Y/N)")
    if ch.upper() == "N":
        break
f = open("stud.dat", " ____________ ")  # statement 2
____________.dump(rec, f)  # statement 3
__________.close()  # statement 4

import __________  # statement 1
rec = []
while True:
    rn = int(input("Enter"))
    nm = input("Enter")
    temp = [rn, nm]
    rec.append(temp)
    ch = input("Enter choice (Y/N)")
    if ch.upper() == "N":
        break
f = open("stud.dat", " __________ ")  # statement 2
__________.dump(rec, f)  # statement 3
__________.close()  # statement 4

import pickle
f=open("data.dat", "rb")
d=____________.load(f)
f.close()

sys.stdout.write("ABC")

import __________  # statement 1
rec = []
while True:
    rn = int(input("Enter"))
    nm = input("Enter")
    temp = [rn, nm]
    rec.append(temp)
    ch = input("Enter choice (Y/N)")
    if ch.upper() == "N":
        break
f = open("stud.dat", " __________ ")  # statement 2
__________.dump(rec, f)  # statement 3
__________.close()  # statement 4