spark showing NULL value while parsing JSON file - json

Question

I have a JSON file that I am reading in spark.
The schema is getting displayed however when I am trying to read the info column or any sub-element it is always NULL. (which is not NULL)
//reading file
val df = spark.read.json("FilePath")
df.printSchema()
root
|-- data_is: boolean (nullable = true)
|-- Student: struct (nullable = true)
| |-- Id: string (nullable = true)
| |-- JoinDate: string (nullable = true)
| |-- LeaveDate: string (nullable = true)
|-- Info: struct (nullable = true)
| |-- details: array (nullable = true)
| | |-- element: struct (containsNull = true)
| | | |-- Father_salary: double (nullable = true)
| | | |-- Mother_salary: double (nullable = true)
| | | |-- Address: String (nullable = true)
| |-- studentInfo: struct (nullable = true)
| | |-- Age: double (nullable = true)
| | |-- Name: String (nullable = true)
df.select("Student").show()
shows the filed value in Student element
even when I parse Student.Id I can get the ID
But whenever parsing the Info, I am always getting a NULL value which is not NULL in the file.
df.select("Info").show() // is showing as NULL
df.select("Info.detail").show() // is showing as NULL
even Info.Summary is NULL.
Can anybody suggest how to get the actual field value instead of NULL?
JSON File
{"Student":{"JoinDate":"20200909","LeaveDate":"20200909","id":"XA12"},"Info":{"studentInfo":{"Age":13,"Name":"Alex"},"details":[{"Father_salary":1234.00,"Mother_salary":0,"Address":""}]},"data_is":true}