How to select unique JSON objects from Identical JSON array with JQ

Below is the input JSON:

{"sn": "fdd","sc": [    {"pn": "di","pv": {"val": "26","com": "="      },"fix": "Hello","tp": "String"    },    {"pn": "di2","pv": {"val": "28","com": "="      },"fix": "Hello2","tp": "String"    }  ]}

Below is the JQ Command I have tried which is generating identical objects:

def getWhereVal(input):[input.sc[]] | unique;def getPreVal(input):input.sc[].fix;. as $input | getPreVal($input) as $preVal | getWhereVal($input)

I am getting below output from above JQ command:

[  {"pn": "di","pv": {"val": "26","com": "="    },"fix": "Hello","tp": "String"  },  {"pn": "di2","pv": {"val": "28","com": "="    },"fix": "Hello2","tp": "String"  }][  {"pn": "di","pv": {"val": "26","com": "="    },"fix": "Hello","tp": "String"  },  {"pn": "di2","pv": {"val": "28","com": "="    },"fix": "Hello2","tp": "String"  }]

I aim to retrieve a distinct object from a set of identical objects, as illustrated below:

{"pn": "di","pv": {"val": "26","com": "="    },"fix": "Hello","tp": "String"  },  {"pn": "di2","pv": {"val": "28","com": "="    },"fix": "Hello2","tp": "String"  }

Can someone please help me to get desired output, I am not able to get result using unique function.