Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the D 48 when the D 50 is d 30?

### Inputs:
table_name: table, columns: ['D 50', 'D 49', 'D 48', 'D 47', 'D 46', 'D 45', 'D 44', 'D 43', 'D 42', 'D 41']

### Response:
SELECT D 48 FROM table WHERE D 50 = d 30