List of Chief Ministers of Punjab (India)
Chief Minister of Punjab (1947-1966) (Punjab, Haryana and Himachal)

№
Name (birth–death); constituency
Portrait
Party (coalition with)
Party (coalition with)
Term of office
Term of office
Term of office
Elections (Vidhan Sabha)
Appointed by(Governor)
1
Gopi Chand Bhargava (1889–1966) MLA for University
-
-
Indian National Congress
15 August 1947
13 April 1949
1 year, 241 days
(Interim Assembly)
Chandulal Madhavlal Trivedi
2
Bhim Sen Sachar (1894–1978) MLA for Lahore City
-
-
Indian National Congress
13 April 1949
18 October 1949
188 days
(Interim Assembly)
Chandulal Madhavlal Trivedi
(1)
Gopi Chand Bhargava (1889–1966) MLA for University
18 October 1949
-
Indian National Congress
20 June 1951
1 year, 245 days
-
(Interim Assembly)
Chandulal Madhavlal Trivedi
(i)
Vacant (President's rule)
Vacant (President's rule)
None
None
20 June 1951
17 April 1952
302 days
—
Rajendra Prasad
(2)
Bhim Sen Sachar (1894–1978) MLA for Ludhiana City South
-
-
Indian National Congress
17 April 1952
23 January 1956
3 years, 281 days
1952 (1st)
Chandulal Madhavlal Trivedi
3
Partap Singh Kairon (1901–1965) MLA for Sujanpur
-
-
Indian National Congress
23 January 1956
9 April 1957
8 years, 150 days
1952 (1st)
Chandeshwar Prasad Narayan Singh
3
Partap Singh Kairon (1901–1965) MLA for Sujanpur
-
-
Indian National Congress
9 April 1957
11 March 1962
8 years, 150 days
1957 (2nd)
Chandeshwar Prasad Narayan Singh
3
Partap Singh Kairon (1901–1965) MLA for Sujanpur
-
-
Indian National Congress
11 March 1962
21 June 1964
8 years, 150 days
1962 (3rd)
Narhar Vishnu Gadgil
(1)
Gopi Chand Bhargava (1889–1966) MLC in Vidhan Parishad
21 June 1964
-
Indian National Congress
6 July 1964
15 days
Hafiz Mohamad Ibrahim
1962 (3rd)
-
4
Ram Kishan MLA for Jullundur City North East
7 July 1964
-
Indian National Congress
5 July 1966
1 year, 363 days
Hafiz Mohamad Ibrahim
1962 (3rd)
-
(ii)
Vacant (President's rule)
Vacant (President's rule)
None
None
5 July 1966
1 November 1966
119 days
—
Sarvepalli Radhakrishnan

Question: Who replaced Congressman Bhim Sen Sachar as Chief Minister ?
Answer: Gopi Chand Bhargava was succeeded by fellow Congressman Bhim Sen Sachar, who then was replaced after 188 days by former Chief Minister Gopi Chand Bhargava.