For every value (column a) return * where column b is maximum

[vedantbah]

I have 4 columns a ,b ,c, d

sample data

a | b | c | d |

1 | 1 | 101 | 0
2 | 1 | 101 | 0
3 | 1 | 101 | 1
4 | 1 | 102 | 0
5 | 1 | 102 | 0
1 | 2 | 101 | 0
2 | 2 | 101 | 1

Write a SQL command such that it should return those rows where for every value of c in b, return rows with maximum a

i.e
Expect output

a | b | c | d |

3 | 1 | 101 | 1
5 | 1 | 102 | 0
2 | 2 | 101 | 1

[Banfa]

And what have you already tried?