What are the missing letters in these words? N

What are the missing letters in these words? N

[style]2[/style] [question] [{ 'title': 'What is the missing letter?', 'image':"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8cTtE0uh2fwdt8TyuBqPq3iTi-Bqfs7WlmFQk0vhGe2w9hgoRS59ASgkWkKZE-ZIlU6KViKtovhKDOFICJdJJTgZdXdCSwklwWuZ7Ive1zt0K2GAd-yJVckQ3qrJkjys4bKpix_TUL4aob1enHVm0RwzZ8PifCAbNE6lTKFDOztVPe967EKdjmyyT/s600/1.jpg", 'answer': [ "__N", "M", "L", "K" ] }, { 'title': 'What is the missing letter?', 'image':"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhIjX8toMNw2HcWtlMfR2mQZAGSp76vpEBvcb5KJUu4JKVRl-QRDkbsdejFU5R5yxeJn3L0TF6LhJ13RclKxPnMKZQuaH3OOm-rLXK60VCs1Na702jw83a-5K0eRdoZo090S9Awf0OmRRv7Wk1drgAj70URWbvO2Z4cmL04yEk8B_31fo4LBVdLQ1Ac/s600/2.jpg", 'answer': [ "B", "__A", "U", "I" ] }, { 'title': 'What is the missing letter?', 'image':"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjhhAzQw6YDBtkZgZrOhOxuc8EkT9vhPWzTpFGkeq7e04cKM04QoA6yi9hf9sr6s7TSDLXVPcwFsqQ7oycaXyQFOIMqPL6LlwYFrilp9FslLhZpa52baIihonoWLRPmtgbPUPMctL2_gIwRQsK-JcVaQoqmNjN6rZgapUevmYc1TanDLjQtGho37yrM/s600/3.jpg", 'answer': [ "E", "A", "__O", "R" ] }, { 'title': 'What is the missing letter?', 'image':"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhi4stW_dv34CCfE5YvgBRgaeDlQ5S_CAV93uM4gAq5GtWg8KYkLZgAgoYEvXhVZ27V2erROe1r9RMQvZ6Yi9zMPazPLyhzUY_fkRAkoJzDyXO9aFXvgakMXdNtpRYNIeQ92coGJ0u7OiD7R7stzlVJdx_hlSDbDSUNpLbDbO7i0ZYfgJeYBvpA9nl/s600/4.jpg", 'answer': [ "N", "K", "D", "__T" ] } ] [/question]