Which of the following keyboard shortcuts is used to group the selected shapes or objects together in MS PowerPoint?

Match the shortcut keys in Column A with their correct functions in MS PowerPoint in Column B: Column A (Shortcut Key) vs Column B (Function) A) 'S' -> 1) Opens the font dialog box B) Ctrl + T -> 2) Inserts a new slide C) Ctrl + M -> 3) Pauses/Stops the slide show D) Ctrl + N -> 4) Opens a new blank presentation

Which of the following shortcut keys is used to add a new blank slide to an existing presentation in MS-PowerPoint 365?