Arrange the following individuals in chronological order based on their terms as Home Ministers of India:
A. Sardar Vallabhbhai Patel
B. Lal Bahadur Shastri
C. Charan Singh
D. P. Chidambaram
1
A, B, C, D
2
A, C, B, D
3
B, A, C, D
4
A, B, D, C