@suresh_kumar4 - pls try below -
add json.net package to your project
create a variable like jsonResult type as JObject
jsonResult = JObject.Parse(strJsonText) - assuming your above json text assigned to strJsonText.
jsonResult(“Year”)(0).ToString - will give you result as “FY2019”
jsonResult(“Year”)(1).ToString - will give you result as “FY2018”
jsonResult(“Month”)(0).ToString - will give you result as “Jan (Oct)”